The date has passed where congress is obligated to accept all states that had certified. They can't uncertify. Congress is obligated to accept all those certified counts. The only state with issues left is Wisconsin, and even if they flipped Republican, Biden has more than enough electoral votes.
On Monday, the Electoral College votes. It's going to go as planned. Several states actually have laws that replace an elector if he or she tries to vote for somebody other than the state winner.
Congress receives the Electoral totals. Congressmen or Senators can object, but objections have to be upheld by both houses or they get dismissed.
So Trump's only path to keep power is a military coup, which is about as likely as a giant asteroid.
33 states have faithless elector laws, some with penalties, some without. Of the remaining 17 states, Trump won 10 of those. Georgia has no faithless elector law. Although, here in Georgia, the election, the popular vote determines which slate of electors cast Georgia's electoral votes. Each candidate on the ballot must submit their list of electors, either chosen by the candidate or his campaign to the secretary of state's office prior to the election. The popular vote winner, it's their chosen electors who will cast Georgia's electoral votes. If there is a faithless elector here, it's the candidates own fault as the candidate choose and placed that name on their list.
I was an elector for Ross Perot in 1996, had he won Georgia, I would have cast an electoral vote for him. I assume most of the remaining 17 states have similar ways of choosing electors.
It's high past time that we start electing Americans to congress and the presidency who put America first instead of their political party. For way too long we have been electing Republicans and Democrats who happen to be Americans instead of Americans who happen to be Republicans and Democrats.