The votes will be close, and too close to call either way. Both sides will demand a recount. We won't know who won until next week. Meanwhile Trump supporters will continue to crash out claiming that millions of non citizens voted and Trump won in a landslide and democrats are trying to rig the election.
They'll show up to polling places with guns demanding that the votes be counted "properly" and the votes cast by "illegals" should be thrown out. There will be some standoff involving law enforcement, and at least 3 Trump supporters will die exchanging gunfire with police or local armed citizens.
The recount will show enough of a lead by Harris+ballots verified by the EC to give her the win. Magats will literally riot and shoot at polling stations+threaten to bomb them. They'll pull up to the Capitol again but there'll be heavily armed federal law enforcement waiting for them. There will be a standoff, Trump will be urged to call them off but he will refuse to pick up the phone or respond to emails--thereby tacitly approving their actions.
A few of them will be gunned down, a few more will be arrested, but the majority will run off before anything can happen to them. They'll continue to claim the election was stolen and will file lawsuits all around the country to try and get the results overturned.