During a presser, President Trump bashed mail-in voting and declared voting an "honor", not a right, guaranteed by the U.S. Constitution.

Trump on voting by mail:

“I don't think it's going to be necessary. Voting is an honor. It shouldn’t be something where they send you a pile of stuff and you send it back. If people mail in ballots, there’s a lot of illegality,” he said at the White House."

Mail in ballots are safe and secure. It's been suggested that Trump fears mail in ballots because he feels its favors Democrats, something not supported by the data.