The Senate will not be flipped by evidence of fraud being found. We have this thing called the Constitution and it is the Supreme Law of the Land. (I know that DC has violated and done end arounds like on 2nd Amendment,but that will be for another day, I want to stick to your post here) Article 1 sec. 5 makes each House the Judge of the elections, returns and qualifications of its own members. So if fraud is beyond a doubt provable you would have to get votes in each House (currently dems hold majority in both with harris voting in senate) to remove the members in question. So if you think Democrats in Congress are going to vote themselves out of majorities in both Houses you will be sorely disappointed. Not to be rude but it is because People don't know the Constitution that we are going to lose it.