After the Al Franken debacle, many on the left probably realized that one can easily get carried away in calling for someone's resignation amid sexual assault allegations (especially if the primary purpose of calling for their resignation is to prove to the other side that you're not hypocritical). Cuomo was asked to resign earlier, he refused, and that was the end of it for a while. It proved that if someone refuses to step down, there isn't much else you can do if you're not willing to go the impeachment route. When more evidence came out, though, it became inevitable, more people turned against him, impeachment was threatened, and he has now resigned. (I also think the allegations against Cuomo are far worse than the allegations against Franken and I agree that in both of these cases, its their own party that has asked them to step down and that is a significant difference from your enemies calling for your ouster).