CHRIS WALLACE (HOST): Joining me now here in Washington to discuss the escalating war of words between [Hillary] Clinton and [Donald] Trump is one of Trump's big supporters, potential running mate, and former House Speaker Newt Gingrich. Mr. Speaker, welcome back to Fox News Sunday.

Previously:

Fox News Figures Back Contributor Newt Gingrich As Trump’s Running Mate

Newt Gingrich: “You Could Say That Trump Is The Candidate Fox & Friends Invented”