Sure there can be fraud, but when it's Trump going with easily debunked "proof" that even Fox News says are lies, the first couple of cases had no kind of proof other than some guy seeing 53 ballots on another table than the rest (I believe that really sums up one of the cases in Georgia).
Not to mention that it seems like something he prepared all along with false statements about mail-voting, attacking the USPS and the rules about when to start counting the votes)
I will certainly be following if he has any kind of actual proof of some major scale fraud, but until then it will be nothing but a sore loser shouting and trying desperately to find a way to stay in office. And if the SCOTUS listen without serious proof I will be seing it as nothing less than a coup!