Report Reveals Why Barack Obama Hasn't Endorsed Kamala Harris In US Polls

Many Democratic leaders have backed Kamala Harris as the party's new US Presidential candidate, but Barack Obama has held off so far.

Many Democratic leaders have backed Kamala Harris as the party's new US Presidential candidate, but ex-president Barack Obama has held off so far.

According to the New York Post, Obama hasn't endorsed Harris - who US President Joe Biden supported after he dropped out of the race on Sunday, as he doesn't think she can beat Republican candidate Donald Trump.

"Obama is very upset because he knows she can't win," a Biden family source told The New York Post.