But effective. Unfortunately.
Not so much. Didn't stop Trump, and hasn't really worked on Moore.
Besides the fact that the accusers just aren't credible, most of the accusations might make it into the "creepy" category and that is about it. And who hasn't had someone of the opposite sex mistakenly think you are making a pass at them?
Compare that with real assault accusations against Franken and Weinstein, and the case against Moore is extraordinarily weak.
It was beyond stupid for Mitch to even try, but par for what we've come to expect from him. The main effect will be against republicans in general as it incites the left, and even if it succeeds Mitch has one less republican in the senate.
A competent leader doesn't get into a passive-aggressive catfight with someone they need to be able to work with no matter how much they dislike the person.