Former President Barack Obama hasn't endorsed Vice President Kamala Harris for the Democratic nomination this year because he believes she has long odds to win. That's according to the New York Post, which cited a source close to the family of President Joe Biden, who dropped out of the race over the weekend. "Obama’s very upset because he knows she can’t win ,” the Biden family source told the Post.

The source added: “Obama knows she’s just incompetent — the border czar who never visited the border, saying that all migrants should have health insurance. She cannot navigate the landmines that are ahead of her.” Read also: George Clooney called Barack Obama before publicly asking Biden to drop out: report Obama notably didn't mention Harris in his statement following Biden's decision to drop out of the race.

In that statement, he said his former vice president was "one of America’s most consequential presidents, as well as a dear friend and partner to me." "Today, we’ve also been reminded – again – that he’s a patriot of the highest order," said Obama. “We will be navigating uncharted waters in the days ahead," Obama added.

"But I have extraordinary confidence that the leaders of our party will be able to create a process from which an outstanding nominee emerges.” Facing questions about why he didn't immediately endorse Harris, a former Obama aide noted that Obama didn't previously endorse the Democratic nominee until after the nominee was decided .