"You can do a search in order to check a box or you can do a search to get a running mate. I think this search is going to be genuine about getting a running mate rather than checking a box." A campaign aide declined to comment on who the Biden campaign is vetting. Since several of the potential contenders are barely known nationally, the Biden campaign is also conducting focus groups, with speeches and videos of the candidates shown to gauge voter reaction. And some top Democrats believe that pressure could move up Biden's timeline on selecting a running mate.

Source: CNN June 26, 2020 11:15 UTC