This is coming from a President that has been recorded, on video, of mail in voting.
He suggested - without providing evidence - that mail-in voting, as it is known in the US, would be susceptible to foreign interference.
"The [Democrats] talk of foreign influence in voting, but they know that Mail-In Voting is an easy way for foreign countries to enter the race," he said.
Mr Trump also said postal voting was "already proving to be a catastrophic disaster" in areas where it was being tried out.
This is coming from a President that has been recorded, on video, of mail in voting.
https://lawandcrime.com/high-profile/trumps-other-access-hollywood-tape-shows-him-voting-by-mail-after-struggling-to-find-a-polling-place-watch/