The files reveal his obsession with genetics. But genes don't work the way he thought. Sign up for the Slatest to get the most insightful analysis, criticism, and advice out there, delivered to your inbox daily.

Add Yahoo as a preferred source to see more of our stories on Google. President Donald Trump appears to have endorsed eugenics during a call in to "The Brian Kilmeade Show" on Friday, telling the Fox News host he believed the country has people in it who are "bad" because "there's something wrong [with their] genetics.