This is extremely general. There are clearly different levels of "American Left" Example Alan Dershowitz showing Trumps path to victory. If you said antifa or Democrat leadership or something this would make more sense.
There was a caller to Rush today. He said he is a Democrat but he did not like most of the current Democrat party policies. He watched the impeachment waiting for them to spring evidence proving President Trump’s guilt and when there was no evidence he was disappointed. He listed a number of other things about why he disagreed with the Democrat Party.
And then he said he VOTED for Democrats!
Rank and file Democrats see their leaders for what they are and they don’t care.