Of course he did:

Voting by mail is safe, secure and there is no fraud. It’s as simple as that.

The U.S. Election Assistance Commission has some thoughts on how to ensure voter confidence in voting-by-mail: Vote-by-Mail-Reform-Memo.pdf

The bottom line? Vote by Mail is utilized widely not only in the United States, but around the world. There is absolutely no proof (or even evidence) of organized or material vote-by-mail fraud here in the United States.

the goal of Trump and his crooked cronies is twofold: 1) to sow further doubt about the integrity of elections so they can claim fraud when they lose, and 2) to deter people from voting. End of story.

From a messaging perspective, it seems pretty simple: “One party - Democrats - want to make it as seamless as possible for all legal - and only legal -voters to vote. One party - Republicans - wants to disenfranchise any voter who they believe will vote against them.”

Which one is more American?

Creedence Clearwater Revival - Fortunate Son