Create a pledge to vote for a leftist candidate. If it surpasses ~85 million signatures, everyone who signed it will vote for the leftist candidate. Otherwise, they will all vote for Biden, since a minimum of 85 million votes are required to guarantee an election win.

I’d sign that shit, and I bet just about every leftist around here would, too. There’s literally no downside.

It is immensely difficult to get 85 people to agree to do something—never mind 85 million—but still not impossible. You almost definitely won’t be able to get 85 million signatures, but you’re more than welcome to try. If you don’t succeed, however, I encourage you to consider the realm of possibility when filling out your ballot. Voting for a third-party candidate and voting for Mickey Mouse—or a dead guy, or Vermin Supreme, or yourself—are equally irrelevant if the third-party candidate does not stand a chance of winning.