Mitt Romney s'est engagé jeudi à redresser l'économie américaine et à créer des millions d'emplois, en acceptant la nomination républicaine à la présidentielle face à Barack Obama, à l'issue d'une convention où tout a été fait pour l'humaniser.

Appelant à "raviver la promesse" d'une Amérique "déçue" par quatre années de présidence Obama, M. Romney a estimé que "ce dont a besoin notre pays aujourd'hui n'est ni compliqué ni profond".

"Ce dont a besoin l'Amérique, c'est d'emplois. Beaucoup d'emplois", a-t-il lancé devant les milliers de délégués républicains réunis à Tampa depuis lundi.

M. Romney a dévoilé un plan en 5 points pour créer 12 millions d'emplois, conscient que l'économie est le souci numéro un des Américains. Le taux de chômage y est de 8,3%.

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  • Republican vice presidential nominee, Rep. Paul Ryan, left and Republican presidential nominee Mitt Romney waves to delegates after his speech at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charlie Neibergall)

  • Republican presidential nominee Mitt Romney acknowledges delegates before speaking at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Jae C. Hong)

  • Republican vice presidential nominee, Rep. Paul Ryan and his wife Janna salute delegates following Republican presidential nominee Mitt Romney's speech during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. Behind is Mitt Romney and his wife Ann. (AP Photo/Charlie Neibergall)

  • Mitt Romney

    Republican presidential nominee Mitt Romney waves to delegates before speaking at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/David Goldman)

  • Mitt Romney

    Republican presidential nominee Mitt Romney acknowledges delegates before speaking at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/David Goldman)

  • Mitt Romney

    Republican presidential nominee Mitt Romney addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/J. Scott Applewhite)

  • Mitt Romney

    Republican presidential nominee Mitt Romney hugs a supporter as he walks to the stage during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/J. Scott Applewhite)

  • Republican presidential nominee Mitt Romney makes his way through delegates before speaking at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charlie Neibergall)

  • Ann Romney, wife of U.S. Republican presidential nominee Mitt Romney, cheers as Olympians are introduced during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charlie Neibergall)

  • Republican vice presidential nominee, Rep. Paul Ryan, right, and his wife Janna applaud during Florida Senator Marco Rubio's speech during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Lynne Sladky)

  • Republican vice presidential nominee, Rep. Paul Ryan, right, along with Ann Romney, wife of U.S. Republican presidential nominee Mitt Romney, left, applaud during Florida Senator Marco Rubio's speech at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Lynne Sladky)

  • Marco Rubio

    Florida Senator Marco Rubio addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charles Dharapak)

  • Florida Senator Marco Rubio addresses delegates during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charlie Neibergall)

  • Marco Rubio

    Florida Senator Marco Rubio addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/J. Scott Applewhite)

  • Clint Eastwood

    Actor Clint Eastwood addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/J. Scott Applewhite)

  • Actor Clint Eastwood speaks to an empty chair while addressed delegates during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Lynne Sladky)

  • Tom Stemberg, founder and former CEO of Staples speaks to delegates during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charlie Neibergall)

  • Bob White

    Chairman of the Romney-Ryan Campaign Bob White addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/J. Scott Applewhite)

  • Pam Finlayson

    Pam Finlayson addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/J. Scott Applewhite)

  • Frantz Placide and Sean Duffy, center, listen to Former Florida Governor Jeb Bush, left, as he speaks during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012.during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Lynne Sladky)

  • Jeb Bush

    Former Florida Governor Jeb Bush addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Jae C. Hong)

  • Former Florida Governor Jeb Bush steps onstage to speak to delegates at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Lynne Sladky)

  • Oscar Poole

    Oscar Poole from Ellijay, Ga., wears his hat at the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/David Goldman)

  • Newt Gingrich, Callista Gingrich

    Former House Speaker Newt Gingrich and his wife Callista addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charles Dharapak)

  • Former House Speaker Newt Gingrich and his wife Callista walk onto the stage to speak to delegates during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charlie Neibergall)

  • Former House Speaker Newt Gingrich and his wife Callista speak to delegates during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charlie Neibergall)

  • Herman Cain recites the Pledge of Allegiance during the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Charlie Neibergall)

  • Connie Mack

    Rep. Connie Mack, R-Fla., addresses the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/J. Scott Applewhite)

  • Senator Scott Brown, R-Mass., answers questions during a press conference in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Patrick Semansky)

  • Stagehands make final adjustments to the expanded stage where Republican presidential nominee Mitt Romney will accept his party's nomination later tonight a the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Jae C. Hong)

  • Protesters yell as Republican vice presidential nominee, Rep. Paul Ryan addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/Jae C. Hong)

  • A delegate holds up a mask of Republican vice presidential nominee, Rep. Paul Ryan during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/David Goldman)

  • Jeb Bush

    FILE In this Aug. 27, 2012 file photo, former Florida Gov. Jeb Bush looks at the convention floor from the podium during a microphone check at the Republican National Convention in Tampa, Fla. (AP Photo/J. Scott Applewhite, File)

  • Stagehands make final adjustments to the expanded stage where Republican presidential nominee Mitt Romney will accept his party's nomination later tonight a the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/J. Scott Applewhite)

  • Paul Ryan

    Republican vice presidential nominee, Rep. Paul Ryan waves toward the delegates during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Paul Ryan

    Republican vice presidential nominee, Rep. Paul Ryan addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Sam Ryan yawns in his mother's arms while Janna listen to her husband Republican vice presidential nominee, Rep. Paul Ryan's speech during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. Right is Charlie Ryan. (AP Photo/Charlie Neibergall)

  • Ann Romney, wife of U.S. Republican presidential nominee Mitt Romney, applauds with Republican vice presidential nominee, Rep. Paul Ryan's wife during Paul Ryan's speech during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/Charlie Neibergall)

  • Republican vice presidential nominee, Rep. Paul Ryan speaks to delegates during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012.(AP Photo/Charlie Neibergall)

  • Condoleezza Rice

    Former Secretary of State Condoleezza Rice addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/Charles Dharapak)

  • Susana Martinez

    New Mexico Governor Susana Martinez addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Condoleezza Rice

    Former Secretary of State Condoleezza Rice addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Mike Huckabee

    Former governor of Arkansas Mike Huckabee addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Mike Huckabee

    Former governor of Arkansas Mike Huckabee addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Mike Huckabee

    Former governor of Arkansas Mike Huckabee addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Republican vice presidential nominee, Rep. Paul Ryan's wife Janna, left, sits next to his mother Betty Ryan Douglas during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/Charlie Neibergall)

  • Tim Pawlenty

    Former Minnesota Governor Tim Pawlenty addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Rob Portman

    Ohio Senator Rob Portman addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • Rob Portman

    Ohio Senator Rob Portman addresses the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

  • John Thune

    South Dakota Senator John Thune gestures to the delegates during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/Charles Dharapak)

  • Rob Portman

    Ohio Senator Rob Portman waves to the delegates during the Republican National Convention in Tampa, Fla., on Wednesday, Aug. 29, 2012. (AP Photo/J. Scott Applewhite)

Dans le discours de sa vie, retransmis en direct devant des millions de téléspectateurs américains, le richissime entrepreneur de 65 ans a essayé de s'ouvrir aux Américains, racontant son histoire, ses origines, sa famille et sa foi mormone.

"Le temps est maintenant venu de raviver la promesse de l'Amérique", a-t-il lancé. "Il est temps de mettre derrière nous les déceptions de ces quatre dernières années, de mettre de côté les divisions et les récriminations".

Après cinq ans d'un long chemin semé d'embûches vers son couronnement à Tampa, Mitt Romney doit à présent tenter de convaincre les Américains de le choisir face au président démocrate Barack Obama lors de l'élection présidentielle du 6 novembre.

M. Romney devait aussitôt la convention républicaine achevée repartir en campagne vendredi en Floride et en Virginie, deux Etats clés en vue de la présidentielle, alors que la campagne présidentielle entre dans sa dernière ligne droite, après la convention démocrate la semaine prochaine à Charlotte (Caroline du Nord).

Cet ancien homme d'affaires multimillionnaire et ancien gouverneur du Massachusetts (2003-2007), qui pendant des années a accumulé les succès dans le secteur privé mais manque de charisme, avait visiblement le souci de se défaire de l'image qui lui colle à la peau, celle d'un home distant, éloigné des préoccupations des gens.

"Le président Obama a promis de freiner la montée des océans et de guérir la planète. Ma promesse (...) est de vous aider, vous, et votre famille", a-t-il lancé longuement applaudi.

Lors de trois jours d'une convention républicaine soigneusement chorégraphiée, et tout particulièrement pendant la dernière journée, tout a été fait pour humaniser le candidat.

Les orateurs ont notamment insisté sur ses qualités humaines, racontant un "homme de compassion", toujours prêt à aider les autres, selon l'un d'eux.

Mardi, son épouse Ann Romney avait elle aussi mis tout son charme dans la balance à la convention.

Des amis mormons du candidat, qui a lui-même évoqué sa religion jeudi soir devant les délégués, ont témoigné de sa foi, mettant en lumière un sujet peu abordé jusqu'alors par le candidat.

"Quand je vois Mitt, je sais que c'est un père aimant, un homme de foi et un ami attentionné", a témoigné un co-religionnaire, Pam Finlayson.

C'était la deuxième fois que Mitt Romney se présentait à l'investiture républicaine, après un premier échec en 2008.

En janvier dernier, la saison des primaires s'était ouverte au profit d'adversaires plus conservateurs, lui étant perçu comme trop modéré par l'aile dure d'un parti qui s'est radicalisé ces dernières années.

Mais à force de ténacité et à coups de millions de dollars, il a finalement réussi à rallier des républicains désireux avant tout de battre le président.

Son choix comme colistier du représentant conservateur Paul Ryan, 42 ans, grand brun athlétique aux yeux bleus, qui a lui aussi été acclamé mercredi soir, est venu à point nommé énergiser sa campagne et y faire souffler un vent de jeunesse.

Parmi les autres orateurs jeudi, l'étoile montante du Parti républicain, le sénateur de Floride Marco Rubio, Jeb Bush, seul membre de la famille Bush présent à Tampa, et plusieurs médaillés des jeux Olympiques de Salt Lake City, que Mitt Romney avait sauvés de la faillite en 2002.

Seule fausse note: l'apparition fatiguée de l'acteur et réalisateur Clint Eastwood, 82 ans, soutien de longue date des républicains.

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