President Barack Obama pauses before delivering a speech at the Global Entrepreneurship Summit at the United Nations Compound on July 25, 2015, in Nairobi.
Photo by Evan Vucci/AP

White House: Obama could endorse in Democratic primary race

President Barack Obama is not ruling out making an endorsement in the 2016 Democratic primary, the president’s spokesman said Monday amid new speculation that Vice President Joe Biden might jump into the presidential race.

“I wouldn’t rule out the possibility of an endorsement in the Democratic primary,” White House press secretary Josh Earnest told reporters.

RELATED: Signs mount for a possible Biden run

Earnest noted that Obama has spoken highly of both Biden and former Secretary of State Hillary Clinton.

“The president has indicated his view that the decision he made, I guess, seven years ago now, to add Joe Biden to the ticket as his running mate was the smartest decision that he had ever made in politics,” he said. “And I think that should give you some sense of president’s view of Vice President Biden’s aptitude for the top job.”

Biden met over the weekend with Massachusetts Sen. Elizabeth Warren, a favorite of progressive Democrats, as he continues to mull a presidential bid.

He also held his regular private lunch with Obama Monday. 

This article first appeared on NBCNews.com.

Barack Obama, Hillary Clinton, Joe Biden and White House

White House: Obama could endorse in Democratic primary race