Republican Party

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Presumptive GOP presidential nominee Mitt Romney campaigns in Frankenmuth, Mich., on Tuesday alongside his wife, Ann, and Michigan Gov. Rick Snyder. Mr. Romney's campaign called his six-state bus swing the "Every Town Counts" tour. (Associated Press)

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Sen. Marco Rubio, Florida Republican, has said he does not expect to be on the GOP ticket this year, but he has campaigned with the likely nominee. (Associated Press)

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The campaign of presumptive GOP presidential nominee Mitt Romney thinks it can end Pennsylvania's Democratic presidential streak at five. (Associated Press)

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Majority Leader Eric Cantor of Virginia, followed by Rep. Jeb Hensarling, Texas Republican, right, leaves a GOP strategy session on Capitol Hill in Washington, Thursday, May 31, 2012. (AP Photo/J. Scott Applewhite)

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** FILE ** House Speaker John Boehner of Ohio meets with reporters following a GOP strategy session on Capitol Hill in Washington, Thursday, May 31, 2012. (AP Photo/J. Scott Applewhite)

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Mitt Romney sewed up the GOP nomination Tuesday night, and he got a call Wednesday from President Obama to wish him well. (Associated Press)

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** FILE ** In this March 31, 2012, photo, Rep. Rick Berg, North Dakota Republican, speaks before the North Dakota GOP Convention in Bismarck, N.D. Berg is running for the Senate seat being vacated by Sen. Kent Conrad. (AP Photo/Will Kincaid, File)

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Mitt Romney, the presumptive GOP presidential nominee, delivers the commencement address at Liberty University in Lynchburg, Va., on Saturday. (Associated Press)

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Sen. Richard G. Lugar of Indiana exits after delivering his GOP primary concession speech in Indianapolis on Tuesday night. The 80-year-old Republican was defeated in his bid for a seventh six-year term, to the delight of many tea party activists. (Associated Press)

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Former Massachusetts Gov. Mitt Romney, the presumptive GOP presidential nominee, speaks at a campaign stop at KP Kauffman Co., an oil and gas production and drilling company, in Fort Lupton, Colo., on Wednesday, May 9, 2012. (AP Photo/Jae C. Hong)