CBS News reports:
Joe Biden has selected his running mate, revealing to top advisers on Tuesday the woman he will invite to join his Democratic presidential ticket, two people familiar with the matter tell CNN. He is poised to make the announcement as early as Tuesday.
The former vice president had spoken directly to the final contenders, according to people familiar with the process, through either face-to-face meetings or remote conversations.
Officials would not say which of the candidates visited Biden in person, but CNN confirmed last week that Michigan Gov. Gretchen Whitmer had flown to Delaware for a meeting. California Sen. Kamala Harris and former Obama national security adviser Susan Rice are among the others seen as the most serious contenders.
Going by MSNBC just now, it could be any minute.