Perhaps centrist leftists have come to realize since the debate that they are on a Wiley Coyote rocket ride with the far left, and they had better get off before the end of the line, so they are turning on their tool, Biden, before it’s too late. That might explain Trump’s selective boisterousness and silence during the debate. He was pushing the right buttons to bring about this epiphany with the right people. Pure speculation.
After Trump wins, they will be as hostile and dishonest as ever, but they are no longer helping Biden. Ships are leaving a sinking rat.
Time limits and then a dead mic for each candidate are fine. Anyone having the discretionary power to cut a candidate’s mic should not happen.