To be clear, what they have to convince the state legislatures to do is throw out the votes of the states. That doesn't impact only the Presidential election; it takes votes away from legislators that picked up votes on split tickets and disrupts every other race that was run in November.

That's a short trip to never being reelected again, so it's a tall order. One state legislature might be stupid enough to do it. Two is staggeringly unlikely. The margin of victory is too high for it to matter if one does.

I don't know what evidence the link you just provided is supposed to be in this situation; True The Vote fails to indicate why the company in question isn't supposed to have access to that file. And given TTV's history, I don't assume that they know one way or the other.