Four Republican Congresscritters (House of Representatives), and four Republican Senators, could announce their intent to caucus with the Democratic party from this point forward, consistent with their oath and legal obligation to support and defend the Constitution against an emerging dictatorship. And then force a vote to change the leadership of the House and the Senate.

It would require a simple majority vote. That's all.

The power of the purse can be taken back by Congress. It can reorganize the committees and resume investigations and oversight where there has been none.