Why are you so dead sure about there is a fraud happening? All the evidence showing there could be a 'voter fraud' are shakey and can be debunked by 'democrat told their voter to mail-in vote, republican told their voter to vote in person, that's why the mail-in votes, which are usually counted after in-person votes, will be extremely democrat-sided'.
Also, if you support Trump even after the whole Russian collusion conspiracy, why can't you support Biden as the president while an investigation undergo?