Nothing Trump does is going to destroy Democrats as much as they have destroyed themselves. They are their own worst enemy. All Trump needs to do is continue making America great and stand back and watch the circular Democrat firing squad take care of itself.
... I believe the Democrats are setting up a scorched earth strategy based on the final stages of the "Cloward/Piven Strategy" while using Alinsky's "Rules for Radical" as a way to control the situation against Conservatives and Constitutionalists where the system is purposely overwhelmed and scuttled to the point of collapse and are willing to destroy this nation using civil unrest and even armed conflict to achieve that end.
Then when the dust settles ... finally institute a Socialist Government as the replacement for the old system of governing.
. ... Shucks ... And the whole movement is being bankrolled by George Soros. It's what he does best.