Inside Obama's internal debate over who to endorse in 2020

Former President Barack Obama has the endorsement every 2020 Democrat wants. Unfortunately for them, Obama isn't handing out any hints about who he'll give it to -- or if he'll even endorse a primary candidate at all. Instead, "Obama and his aides have carefully guarded when and how to deploy him," and are even prepared for him to step in and use his endorsement if there's a chance of a contested convention, The Atlantic reports. The most obvious 2020 endorsement for Obama would be his former Vi...