Agree or not, Trump's claim is that mail voting undermines integrity. And whether he's theoretically correct or not, honest or not, the first evidence from Paterson NJ showed that mail-in voting spoiled every vote for council. The number of ruined ballots was greater than the margin of victory. People are calling it a "win" because some of the fraudsters (or misguided people accidentally violating electionaw) were arrested, but that doesn't unspoil the vote.