Obama's endorsement won't help Biden

After months of silence, former President Barack Obama is reportedly set to endorse his past running mate, Joe Biden, for president. But Obama’s endorsement won’t mean much, and it likely won’t help Biden, either.

Obama’s endorsement is supposed to unify the Democratic Party — that’s why he’s waited so long to support a specific candidate. He wanted to throw his weight behind the voters’ choice, so as to prevent further division from spreading within the party’s ranks. But there’s very little left to unify. The voters who could have been swayed by Obama a few months ago have no problem voting for Biden now.