V #BBC Katty Kay:
Three key state governors being vetted by #Harris camp:
Andy Beshear, Kentucky gov, who's proved himself by being elected as a Democratic governor in a conservative state.
Josh Shapiro from Pennsylvania, who could help with winning his home state.
Roy Cooper, the governor of North Carolina, another Democrat who has done well in a conservative state.
(Gretchen Whitmer of Michigan, Gavin Newsom of California and Transport Sec Pete Buttigieg has also been mentioned by pundits)