I wonder if there's going to be another race to fill the VP slot for Biden and Sanders. They're both old with a good chance they could keel over during their presidency. It could explain why Gabbard is still in the race and hasn't berated either of them yet.
One of the reasons the debates are so cordial and you didn't hear the candidates going after each other (except for Tulsi) is because they don't want to burn the bridge that might lead to their being selected as a running mate.
I could see Bernie choosing Tulsi. She supported him in 2016, her anti-war views coincide with his, and her "demographic categories" would be more attractive to the far left over the "Old White Man" choosing her.
Since Bernie is the oldest candidate (he turned 78 in Sept 2019), and he just suffered a heart attack , the Bernie/Gabbard Presidential team could give the US our first female President. I have a dollar that says Bernie won't survive 8 years in office, which would make him 86 years old in Jan 2029. if he happens to make it until then, Tulsi, as the incumbent VP, would have a very good shot at being the presumptive nominee to set herself up to win the presidential election.
Lots of reasons he might pick her to run with him. Of course, the party has to want her, which is a much tougher sell. Tulsi doesn't seem to want to kneel before the Democrat demigods.