Trump made the remark at the end of a speech to supporters in Oshkosh, Wis., Monday afternoon as he implored them to vote. It follows months of Trump claiming without evidence that widespread mail-in voting during the coronavirus pandemic would invite fraud into the election.

“We have to win the election. We can’t play games. Go out and vote. Do those beautiful absentee ballots or just make sure your vote gets counted. Make sure, because the only way we are going to lose this election is if the election is rigged,” Trump told the group of supporters at the outdoor campaign event. “Remember that. It’s the only way we’re going to lose this election, so we have to be very careful.”

“The only way they’re going to win is that way. And we can’t let that happen,” Trump said, just hours before Democrats are to begin their 2020 convention to formally nominate Joe Biden as the party’s presidential candidate.