Donald Trump

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Newt Gingrich and Donald Trump shake hands after speaking to reporters in New York on Monday. Mr. Gingrich praised Mr. Trump after Rep. Ron Paul earlier criticized him and declined an invitation to a debate he will host in Iowa on Dec. 27. (Associated Press)

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** FILE ** In this Oct. 3, 2011, file photo Republican presidential candidate Herman Cain stops to address the media as he arrives for a meeting with developer Donald Trump in New York. (AP Photo/Richard Drew, File)

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** FILE ** Donald Trump waves after addressing the Conservative Political Action Conference (CPAC) in Washington on Thursday, Feb. 10, 2011. (AP Photo)

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Associated Press photographs An unconventional politician, Republican presidential hopeful Donald Trump has said that China should face taxes on imports until it stops manipulating its currency and that the U.S. should seize Iraq's oil fields to pay itself back for the cost of the war. But a retired GOP senator says few are taking his candidacy seriously.

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ASSOCIATED PRESS Republican National Committee Chairman Reince Priebus defends real estate mogul Donald Trump as a possible GOP presidential candidate who should be allowed to speak his mind about any issue, even the “birther” one.

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Real estate mogul Donald Trump could make inroads among the religious right in the Republican Party presidential nominating race for 2012 if he picked up the endorsement of the scion of one of the 20th century's foremost evangelists. (Associated Press)

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Donald Trump says Karl Rove, who called Mr. Trump's possible presidential bid a "joke," indirectly "gave us Barack Obama" with policies he promoted in the George W. Bush administration. (Associated Press)

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Donald Trump speaks at the South Florida tea party's third annual tax day rally on Saturday, April 16, 2011, at Sanborn Square in Boca Raton, Fla. Sounding increasingly like a candidate, Mr. Trump repeatedly told a raucous crowd he has the qualities needed in the White House and the conservative ideals necessary to seal the Republican nomination should he decide to run. (AP Photo/Palm Beach Post, Gary Coronado)

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"If I run and win, our country will be respected again and China, OPEC, and all of the many nations ripping off this great country of ours will be dealt with very, very differently," billionaire developer Donald Trump told the crowd at a Florida tea party gathering on Saturday. (Associated Press)

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Donald Trump, mulling a White House run, will lend his celebrity to a tea party rally Saturday in Florida also featuring Rep. Allen B. West. (South Florida Tea Party)

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** FILE ** In this March 9, 2011, file photo, Donald Trump arrives at a Comedy Central Roast in New York. (AP Photo/Charles Sykes, File)

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Donald Trump is photographed during a news conference at the Trump Tower, Tuesday, April 5, 2011 in New York. Indianapolis Motors Speedway announced Tuesday that Trump will be the 100th Anniversary Indianapolis 500 pace car driver. (AP Photo/Mary Altaffer)

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Real estate developer Donald Trump (left) listens as Georgian President Mikhail Saakashvili speaks during a joint news conference in New York on Thursday, March 10, 2011. Mr. Trump and a Georgian development group have agreed to build a Trump Tower in Georgia. Mr. Trump indicated he seriously is considering a run for the U.S. presidency. (AP Photo/Mark Lennihan)