What do you think?

KNUS radio talk show host Dan Caplis asks a good question today: Should the GOP require all of its candidates to pledge that they will not run as a third party candidate should they fail to get the GOP nomination? The answer seems obvious to me, in light of Donald Trump's past support for Hillary Clinton and other Democrats in order to grease the skids for his building projects, and in light of his popularity, and in light of Ross Perot getting enough third party votes to hand the 1992 election to the Clintons.