Senate

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Former Sen. George LeMieux, who finished Sen. Mel Martinez's term, dropped out of the Republican primary for Senate in Florida on Wednesday. (Associated Press)

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Republican state Sens. Joel Anderson (left), of La Mesa, and Bill Emerson, of Redlands, confer June 14, 2012, during the Senate session at the Capitol in Sacramento, Calif. (Associated Press)

** FILE ** Former Sen. George Allen celebrates with his wife, Susan (left), and daughter Tyler in Richmond on Tuesday, June 12, 2012, after securing a win in Virginia's Republican primary in his effort to reclaim his old Senate seat. (AP Photo/Steve Helber)

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FILE - In this March 31, 2012, file photo, Rep. Rick Berg, R-N.D., speaks before the North Dakota GOP Convention in Bismarck, N.D. Berg is running for the Senate seat being vacated by Sen. Kent Conrad. North Dakota’s prosperity from an energy boom as the rest of the country slowly crawls out from under the economic wreckage of four years ago is making a contest of a Senate race that Democrats had all but conceded. A former state attorney general with ties to the energy industry, Heidi Heitkamp, may be the state’s only Democrat who can prevent the party from losing retiring Sen. Kent Conrad’s seat. (AP Photo/Will Kincaid, File)

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Democratic state Senate candidate John Lehman gives a high-five to a young supporter as he arrives for an election-night party at the Racine Labor Center in Racine, Wis., on Tuesday, June 5, 2012. (AP Photo/Scott Anderson, Journal Times)

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Texas Lt. Gov. David Dewhurst, a Republican candidate for the Senate, visits a restaurant in Houston on Tuesday, the day of the primary. Mr. Dewhurst touts his experience in the Air Force, the CIA and in business. (Associated Press)

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Ted Cruz, a Texas Republican primary candidate for Senate, says of Tuesday's vote: "The stakes could not be higher." (Houston Chronicle via Associated Press)

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Loretta Nowakowski, president of the Democratic Club at the Greenspring retirement commmunity in Springfield, chats with Democratic Senate hopeful Tim Kaine, who was there to court seniors. (Barbara L. Salisbury/The Washington Times)

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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)