Campaigning in New Hampshire

Republican presidential candidate, billionaire Donald Trump, gestures to the crowd as he signs autographs at a campaign event at Plymouth State University Sunday, Feb. 7, 2016, in Plymouth, New Hampshire.

Democratic presidential candidate Hillary Clinton meets with customers as she picks up her food order, Feb. 7, 2016, at Puritan Backroom restaurant in Manchester, New Hampshire.

Republican presidential candidate, Senator Ted Cruz, laughs after a question from a 9-year-old boy during a town hall-style campaign event, Feb. 7, 2016, in Peterborough, New Hampshire.

Democratic presidential candidate, Senator Bernie Sanders, speaks during a campaign stop at Great Bay Community College, Sunday, Feb. 7, 2016, in Portsmouth, New Hampshire.

Republican presidential candidate, Senator Marco Rubio, holds a snow ball while playing with his children after a campaign stop Feb. 7, 2016, in Hudson, New Hampshire.

A man holds a photograph of Republican presidential candidate Jeb Bush as Bush greets people after a campaign event in Salem, New Hampshire, Feb. 7, 2016.

Republican presidential candidate, Ohio Governor John Kasich, talks to voters during a campaign stop at a high school Feb. 7, 2016, in Concord, New Hampshire.

Republican presidential candidate, New Jersey Governor, Chris Christie, speaks at a town hall-style campaign event at Hampton Academy, Feb. 7, 2016, in Hampton, New Hampshire.