 They also believe that Kamala Harris will become the nominee for president if Biden drops his bid. And the talk among high level Democratic strategists and donors has now turned to who would be best positioned to serve as Harris's running mate for the VP slot. The shortlist has boiled down to Senator Mark Kelly, Democrat of Arizona. You know, he's married to Gabby Giffords. He's a former astronaut and many people wanted him to run for president.