Yahoo News/YouGov poll: against Trump, Biden does better than Sanders in battleground states and with swing voters

A new Yahoo News/YouGov poll suggests that Bernie Sanders could be a riskier nominee that his supporters are willing to admit. In a national trial heat with Trump, Sanders led 48 percent to 42 percent among registered voters. But when the playing field was narrowed to the 10 states that were closest in the 2016 presidential election, Sanders’s lead over Trump was slashed in half.