Le magnat américain de l'immobilier Donald Trump, qui promettait de faire des révélations fracassantes sur Barack Obama, a fait un flop mercredi en renouant, dans une vidéo de cinq minutes, avec son obsession sur la nationalité du président sortant.

Dans une vidéo mise en ligne sur sa page Facebook et son compte Twitter, le milliardaire promet de verser 5 millions de dollars à l'organisme de charité du choix de Barack Obama si ce dernier accepte de publier d'ici le 31 octobre ses diplômes et son formulaire de demande de passeport.

"S'il publiait ces documents, il mettrait un terme aux questions et à la colère de nombreux Américains", y explique-t-il.

M. Trump met régulièrement en doute le fait que M. Obama est né aux Etats-Unis, condition sine qua non pour devenir président selon la Constitution américaine. En mai 2011, la Maison Blanche avait tenté de mettre fin à la controverse en publiant l'acte de naissance complet du président, né à Hawaii.

Le milliardaire, friand de mises en scène théâtrales et de déclarations fracassantes, avait promis il y a quelques jours "une très très grosse" annonce ce mercredi à 16H00 GMT.

La mise en ligne de cette vidéo a provoqué une véritable avalanche de tweets moqueurs sur "The Donald", l'un des surnoms du magnat de l'immobilier.

L'équipe de campagne de Barack Obama a à peine daigné réagir à la vidéo de Donald Trump, préférant renvoyer les éventuelles questions vers l'équipe du républicain Mitt Romney. "Etant donné que Trump est l'un de ses plus fervents partisans, ces questions devraient être adressées à l'équipe Romney", a déclaré la porte-parole de Barack Obama, Jen Psaki.

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  • US-VOTE-2012-DEBATE

    This combination of images show US President Barack Obama and Republican presidential candidate Mitt Romney embracing their spouses after the first presidential debate at the university of Denver on October 3, 2012 in Denver, Colorado. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama listens during his debate with Republican Presidential candidate Mitt Romney at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) and Republican presidential candidate Mitt Romney (L) participate in the first presidential debate at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012, moderated by Jim Lehrer (C) of the PBS NewsHour. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama and Republican presidential candidate Mitt Romney make their way to their lecterns October 3, 2012 after shaking hands for the first presidential debate at the University of Denver in Denver, Colorado. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama greets Republican presidential candidate Mitt Romney October 3, 2012 as he arrives on stage for the first presidential debate at the University of Denver in Denver, Colorado. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama arrives on stage October 3, 2012 for the first presidential debate at the University of Denver in Denver, Colorado. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama and Republican presidential candidate Mitt Romney wave October 3, 2012 after shaking hands as he arrives on stage for the first presidential debate at the University of Denver in Denver, Colorado. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama and Republican presidential candidate Mitt Romney make their way to their lecterns October 3, 2012 after shaking hands for the first presidential debate at the University of Denver in Denver, Colorado. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US First Lady Michelle Obama (2nd-L) listens as US President Barack Obama and Republican presidential candidate Mitt Romney participate in the first presidential debate at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012, moderated by Jim Lehrer of the PBS NewsHour. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    Republican presidential candidate Mitt Romney speaks during his debate with US President Barack Obama at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012, moderated by Jim Lehrer (C) of the PBS NewsHour. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) and Republican presidential candidate Mitt Romney (L) participate in the first presidential debate at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012, moderated by Jim Lehrer (C) of the PBS NewsHour. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) and Republican presidential candidate Mitt Romney (L) participate in the first presidential debate at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012, moderated by Jim Lehrer (C) of the PBS NewsHour. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) kisses First Lady Michelle Obama in Denver, Colorado, on October 3, 2012 at the end of the first presidential debate with Republican presidential candidate Mitt Romney. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama speaks during his debate with Republican Presidential candidate Mitt Romney at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (L) and Republican presidential candidate Mitt Romney finish their debate at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama and Republican presidential candidate Mitt Romney shake hands October 3, 2012 at the conclusion of the first presidential debate at the University of Denver in Denver, Colorado. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama and Republican presidential candidate Mitt Romney share a laugh October 3, 2012 at the conclusion of the first presidential debate at the University of Denver in Denver, Colorado. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama and Republican presidential candidate Mitt Romney walk towards their wifes October 3, 2012 at the conclusion of the first presidential debate at the University of Denver in Denver, Colorado. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (top) speaks during his debate with Republican Presidential candidate Mitt Romney (bottom) at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (2n-L) and First Lady Michelle Obama (L) join Republican Presidential candidate Mitt Romney (2nd-R) and his family at the conclusion of the first presidential debate on October 3, 2012 in Denver, Colorado. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    Republican presidential candidate Mitt Romney speaks to moderator Jim Lehrer during his debate with US President Barack Obama at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney go head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) speaks during his debate with Republican Presidential candidate Mitt Romney (L), who greets the audience at the conclusion in Denver, Colorado, on October 3, 2012. AFP PHOTO / Nicholas KAMM (R)/SAUL LOEB (L) (Photo credit should read STF/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) greets Republican presidential candidate Mitt Romney (L) following the first presidential debate at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) greets Republican presidential candidate Mitt Romney (L) following the first presidential debate at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    Republican presidential candidate Mitt Romney stands with his wife Ann and family following the first presidential debate with US President Barack Obama at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    Republican presidential candidate Mitt Romney stands with his wife Ann following the first presidential debate with US President Barack Obama at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama gestures on stage following his debate with Republican presidential candidate Mitt Romney at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) and Republican presidential candidate Mitt Romney (L) arrive for the first presidential debate at Magness Arena at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) and Republican challenger Mitt Romney shake hands following their first debate at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) and Republican challenger Mitt Romney (L) participate in their first debate at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) and US First Lady Michelle Obama (C) walk on stage before Republican presidential candidate Mitt Romney (L) following their first debate at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)

  • US-VOTE-2012-DEBATE

    US President Barack Obama (R) and Republican challenger Mitt Romney (L) participate in their first debate at the University of Denver in Denver, Colorado, October 3, 2012. After hundreds of campaign stops, $500 million in mostly negative ads and countless tit-for-tat attacks, Obama and Romney went head-to-head in their debut debate. AFP PHOTO / Nicholas KAMM (Photo credit should read NICHOLAS KAMM/AFP/GettyImages)