I thought at the time when McConnell blocked the vote on the stimulus supplement and then tried his cutesy poison pill shit that he thought he was being smarter than he was. People are a lot of things but they understand a simple premise of if you vote Dems you get money. Nothing is more motivating to people than a direct tangible benefit like cash.
If he is as smart as he thinks he is he would have just allowed the vote and cut his losses as it was popular with both Trumpers and Dems. Literally the only people who didn't want it were the donors he is beholden to.