Mike Pence's Chances of Beating Donald Trump, According to Polls

Former Vice President Mike Pence is officially entering the race for the Republican presidential nomination, setting him up for a head-to-head collision with former running mate Donald Trump and several other White House hopefuls who see themselves as the heirs of the conservative movement Trump helped to stoke more than five years ago.

If early poll numbers are to be believed, Pence has much work to do to make space for himself in what is becoming an increasingly saturated field that has already faced challenges contrasting their positions with those...