One other point that some might be missing. The votes from the Electoral College goes to Congress for verification. One Representative and One Senator from a state may protest the vote(s) from that state. If protested, it must be resolved by Congress before the votes can be tallied and finalized. So even if say 3 won state’s electors change their pledged votes and vote against Trump, they can be protested which I would think can be reversed to be for Trump.
I expect a lot if not all of Trump’s states to be objected to by the Dems just to be a PIA so they can say he was selected by be Republican congress.
When that fails, they will file impeachment charges prior to the inauguration, and probably some other actions not yet thought of to delay swearing in.