OK, let’s try to get this straight. President Donald Trump doesn’t trust mail-in voting — until he does. For example, he denounced the very idea of voting by mail as an invitation to commit voter fraud, a bipartisan suspicion, and a problem which he tends to pin solely on Democrats. That’s politics. But the president changed that tune in the middle of this past week to suggest in a tweet that voting by mail is just dandy — if it is in states that are run by Republican governors.