I predict they will go far Left in 2020, lose again badly and regroup behind a Bill Clinton-esque moderate sounding Progressive that will bring the rhetoric down and act "reasonable" and will make the "World love us again". Obama did that and was wildly successful in getting elected and a total flop in leadership. If the Dems find this Bill Clinton type, they will take the WH in 2024, but not both houses of Congress. You saw it here first. America changes the Party in the WH every 8 years with regularity. Barring complete economic chaos, Trump not only survives, but gets re-elected. That will send the Far Left of Dem Party into a catatonic state.

"The Democrat Party looks like Titanic survivors. Partying and celebrating one moment, and huddled in lifeboats freezing the next". Hatari 2017

"Hokey religions and ancient weapons are no match for a good blaster at your side, kid." Han Solo