The ABA keeps a list of current litigation on election law. [1] Election law cases almost invariably come down to nobody wanting or being able to take responsibility. People are aware of issues, but the court cases take too long and the courts rule there is no remedy after the election, the plaintiffs suing have no standing, there is no remedy in law, since the legislature should oversee not the courts, etc. Yet, the legislatures do nothing but talk. Saying there isn't elections fraud all around is incorrect.

[1] https://www.americanbar.org/groups/public_interest/election_...

I didn't see where that supported the claim that 90% of voter fraud is carried out by republicans.