I don't think that the Democrats know what to do with Trump, but their attacks are amazingly unimaginative.
One thing that isn't working is the constant Democratic tut-tutting over Trump's "behavior". Yes, he's offensive, but most Americans are more offended by constantly being told what they can and can't say. Yes, folks should have a filter, but political correctness has, in the opinion of many, gotten way out of hand. Hillary's lecturing of Trump on his treatment of women, etc., became unproductive overkill. That's because Trump still gets passes for being a celebrity. That may not be so true as time goes by, but the more Trump's enemies treat him as a "celebrity" and a "reality TV star", their attacks on his personal behaviors will have diminished effectiveness.
Does anyone actually think that too much political correctness is a real issue.
The right won't stop talking about it so yes.