“Get rid of the ballots and you’ll have a very peaceful – there won’t be a transfer, frankly. There’ll be a continuation,” he said.
Mr Trump’s latest insistence that there cannot be a fair presidential election on November 3 came as pressure mounts over his plan to put a new, right-leaning justice on the Supreme Court.
Mr Trump is set to nominate a replacement on Saturday for the late liberal-leaning justice Ruth Bader Ginsburg. His Republican Party, which has a majority in the Senate, is then expected to quickly confirm the nominee.
If they succeed, the nine-justice court would then likely have a strongly pro-conservative bent for years to come.
Democrats are crying foul, saying that the process should wait until the results of the election are known, allowing the winner to shape the Supreme Court.
With Mr Trump and the Republicans mounting a series of court challenges against the use of mail-in ballots, the chances of a contested election result are considered high.
On Wednesday, Mr Trump said he thinks the election “will end up in the Supreme Court.”