U.S. President Barack Obama, right, speaks as U.S. Vice President Joe Biden stands in the Rose Garden at the White House in Washington, D.C., U.S. (Photographer: T.J. Kirkpatrick/Bloomberg)
Obama Holds Off on Endorsing Biden, His Vice President
(Bloomberg) -- Ex-President Barack Obama is holding off on an endorsement of his former running mate, Joe Biden, who on Thursday joined the race for the 2020 Democratic presidential nomination.