Must happen by the date of the senate primary election. I will adjust the close date to reflect that when the primary is scheduled.

Resolves YES if either Sanders publicly withdraws his endorsement OR if Platner drops out of the race before Sanders does so.

Resolves NO if Platner stays in the race and Sanders keeps his endorsement.

I will not bet in this market, so as to remain objective in edge cases. I generally try to resolve to PROB in gray areas rather than N/A, fyi.