Republican presidential candidate, former Massachusetts Gov. Mitt Romney, listens as he is introduced by Sen. Kelly Ayotte, R-N.H., as he campaigns at Pinkerton Academy in Derry, N.H., Saturday, Jan. 7, 2012. (AP Photo/Charles Dharapak)
**FILE** Sen. John McCain (center), Arizona Republican and ranking Republican on the Senate Armed Services Committee, flanked by Senate Minority Whip Jon Kyl (left), Arizona Republican, and fellow committee member Sen. Kelly Ayotte, New Hampshire Republican, speaks Dec. 14, 2011, during a news conference on Capitol Hill to announce an effort to replace the defense sequester mandated as a result of the supercommittee's failure. (Associated Press)
Former Massachusetts Gov. Mitt Romney, a Republican presidential candidate, speaks to supporters outside City Hall in Nashua, N.H., on Sunday. Sen. Kelly Ayotte (left) of New Hampshire listens. Mrs. Ayotte endorsed Mr. Romney. (Associated Press)
Flanked by fellow Republican Sens. Kelly Ayotte of New Hampshire and John Barrasso of Wyoming, Senate Minority Leader Mitch McConnell of Kentucky speaks to reporters Tuesday. "The debate has turned from how much to grow government to how much to reduce it," he said. (Associated Press)
Kelly Ayotte, celebrates with her husband, Joe Daley, after learning she won the Republican nomination for U.S. Senate in Concord, N.H. The former state attorney general defeated tea-party-backed conservative Ovide Lamontagne in the GOP primary on Tuesday.
Republican U.S. Senate hopeful Kelly Ayotte talks to supporters with her husband Joe Daley at her side in Concord, N.H., Tuesday, Sept. 14,2010. Ayotte is in a close race with Ovide Lamontagne for the Republican nomination in a race still too close to call. (AP Photo/Jim Cole)