The subtext of why there was no serious primary challenge to Biden| www.natesilver.net
So is Trump's, but an extra four years makes a difference, and it could be the difference in the election.| www.natesilver.net
The latest political polls and polling averages from FiveThirtyEight.| FiveThirtyEight
The latest political polls and polling averages from FiveThirtyEight.| FiveThirtyEight