One other clarification: What it means to "endorse". I'm looking for an official endorsement in terms of voting, and not something informal like, "I sure wish Biden would step down and XYZ would run instead."

It occurs to me that TS might first endorse Biden and then, later, endorse another candidate. If so, however, according to the criteria in the description, I will have already resolved this market NO (when TS endorsed Biden).

I need this market so I can arbitrage two others. Please bid it way down so then I can get a bunch of shares cheap!