Chris Christie

Tiffany Trump, daughter of Donald Trump and Marla Maples, will speak Tuesday night at the Republican convention. She has not been a presence on the campaign trail. Paul Sancya/AP hide caption

Chris Christie makes a midday stop at T-Bones Great American Eatery in Derry, N.H., as he canvasses for votes on Tuesday. Meredith Nierman/WGBH hide caption

Bernie Sanders and Donald Trump deliver victory speeches at their respective watch parties in New Hampshire. Jewel Samad/AFP; Joe Raedle/Getty Images hide caption

Republican Chris Christie of New Jersey has invested nearly his entire campaign on New Hampshire. A poor result will almost certainly effectively end his candidacy. Robert F. Bukaty/AP hide caption

Donald Trump flashes a thumbs up after finishing second in the Iowa caucuses last week. Jim Watson/AFP/Getty Images hide caption

Republican presidential candidate Donald Trump speaks as the crowd applauds during a campaign stop at the Radisson Hotel in Nashua, N.H., on Friday. John Minchillo/AP hide caption

Thanks to the current nomination calendar, U.S. presidential candidates (like Chris Christie, pictured at the 2015 Iowa State Fair) get lots of practice at flipping pork chops. Scott Olson/Getty Images News hide caption

An American soldier carrying equipment walks past an American flag at Incirlik Air Base in Adana, Turkey, as U.S. Air Force war planes are used against ISIS. Anadolu Agency/Getty Images hide caption

New Jersey Gov. Chris Christie speaks at a No Labels Problem Solver convention in Manchester, N.H., in October 2012. Jim Cole/AP hide caption