The smarter Dems in Congress are catching on that Trump-hatred anchors their party to ending the Trump Boom.  Hand them the majority, and they'll paralyze us with impeachment.

They know that Americans are responding to good economic times the way people always do: they like the party in power because they want the good times to continue.  All those bonuses have tantalized millions who aren't receiving them.  They tell everyone money is in the air for people willing to show up and work.  People don't want to upset the apple cart.

And this is freaking out the Democrats. 

They are watching their generic preference poll advantage collapse.  And they all know that the Republicans always outperform the generic polls on Election Day.  The RCP graph below has a strong lag factor, for it averages polls going back a month.

Heather Caygle reports in Politico:

[M]any Democrats say they're watching nervously as polls start to trend in Republicans' favor – and worry they're witnessing the beginning of a slow-motion train wreck that they have no idea how to stop.

It's a fun schadenfreude read.  They are split on what to do and arguing with each other while fearing for their political future.  Some even suspect that all this focus on hating Trump might not be working.

Lots of luck selling that to the base, whose enthusiasm you absolutely need.