Sen. Lindsey Graham, South Carolina Republican and 2016 presidential candidate, speaks in Manchester, N.H., on June 3, 2015. (Associated Press) **FILE**
Sen. Lindsey Graham, South Carolina Republican and presidential hopeful, speaks at a Peace, Prosperity and National Security Forum in Manchester, N.H., on June 3, 2015. (Associated Press) ** FILE **
Former Maryland Gov. Martin O'Malley speaks to the media during a campaign stop at Goldenrod Drive-in Restaurant, Sunday, May 31, 2015, in Manchester, N.H. (AP Photo/Mary Schwalm) ** FILE **
Republican presidential candidate, Sen. Rand Paul, R-Ky speaks to a group of business leaders, Monday, May 11, 2015, in Manchester, N.H. (AP Photo/Jim Cole)
Republican presidential candidate and retired neurosurgeon Ben Carson speaks during an event at Manchester Community College, Sunday, May 10, 2015, in Manchester, N.H. (AP Photo/Mary Schwalm)
Republican presidential candidate and retired neurosurgeon Ben Carson speaks during an event at Manchester Community College, Sunday, May 10, 2015, in Manchester, N.H. (Associated Press) ** FILE **
Republican presidential candidate Carly Fiorina, the former Hewlett-Packard chief executive, gestures during her address at an N.H. High Tech Council event in Manchester, N.H., Friday, May 8, 2015. (AP Photo/Charles Krupa)
New Jersey Gov. Chris Christie, R-N.J. and his wife Mary Pat, left, listen to Melissa Crews during a stop at the Farnum Center, Thursday, May 7, 2015, in Manchester, N.H. (AP Photo/Jim Cole)
Arthur Kamberis, a 95-year-old World War II veteran, used his cane to fight off a would-be robber in Manchester, New Hampshire, over the weekend, police said. (WMUR 9)
Republican presidential candidate, Sen. Marco Rubio, R-Fla., laughs as he is surrounded by media at a campaign house party in Manchester, N.H., in this April 17, 2015, file photo. (AP Photo/Elise Amendola)
National Edition News cover for April 7, 2015 - Rand Paul begins quest for White House: Sen., Rand Paul, R-Ky. speaks to employees during a visit to Dyn, an internet performance company Friday, March 20, 2015, in Manchester, N.H. (AP Photo/Jim Cole)
Sen., Rand Paul, R-Ky. speaks to employees during a visit to Dyn, an internet performance company Friday, March 20, 2015, in Manchester, N.H. (AP Photo/Jim Cole)
Hillary Rodham Clinton, right, greets voters with, U.S. Sen. Jeanne Shaheen, D-N.H., far left and Gov. Maggie Hassan, D-N.H., center at the puritan Backroom Restaurant, Sunday, Nov. 2, 2014 in Manchester, N.H. (AP Photo/Jim Cole)
U.S. Sen. Rand Paul, R-Ky., speaks Friday, Sept. 12, 2014 at a GOP unity breakfast in Manchester, N.H. Paul considered a possible Republican presidential candidate in 2016, made a visit to the key early voting state of New Hampshire at the state Republican Party's "Unity Breakfast" following Tuesday's state primary. (AP Photo/Jim Cole)
Alex Amato of Manchester, England cools off at the Georgetown Waterfront Park water fountain, Washington, D.C., Tuesday, May 27, 2014. (Andrew Harnik/The Washington Times)