Joe Biden’s presidential campaign is making two arguments in the last few days before the Iowa caucuses. One is all about the heart—you know Joe, you love Joe. The other argument is all in the head—Democrats need to vote for a candidate who can beat Trump. But how does that argument fare when you look up close at voters in Iowa? Guests: Slate’s senior politics writer Jim Newell and What Next producer Mary Wilson.Slate Plus members get bonus segments and ad-free podcast feeds. Sign up now. Learn more about your ad choices. Visit megaphone.fm/adchoices