“New research suggests Sanders would drive swing voters to Trump — and need a youth turnout miracle to compensate.”

Political scientists David Broockman and Joshua Kalla write: Decades of evidence from academic studies suggests that more moderate nominees tend to perform better in general elections than more ideologically extreme nominees. For example, [political scientist Alan Abramowitz found that] Democratic US House candidates who supported Medicare-for-all fared approximately 2.2 percentage points worse [on average] in …