Trump won't be able to get anything done if the Dems control either the House or Senate. Anything that requires support from Congress is barely moving forward now, but even if the Republicans are not helping, they're mostly not dedicated destroyers.
If Republicans lose in the midterms, and the dickless Dems impeach, the chance of violent resistance on the fringes increases, IMHO.
I'd say that the prospects for fringe from either side to go rogue is not far off, the tinder is dry and the sparks are flying, remain diligent.:|If the Dems take back control of the House an impeachment process is likely to be passed by the House. But...., it is my understanding that, should that happen, the impeachment must go to the Senate for their vote and the Dems don't have much of a chance of retaking the Senate so an impeachment passed in the House isn't likely to succeed.