April 1 (UPI) -- President Donald Trump has signed an executive order imposing new restrictions on mail-in voting ahead of November's midterm elections, drawing condemnation and vows from critics to challenge in court what they called unconstitutional voter suppression.

The order, signed by the president during an Oval Office press conference, is the latest executive effort by the Trump administration to exert federal control over U.S. elections ahead of the upcoming midterms. Trump, who continues to falsely claim he won the 2020 election, has repeatedly called for stronger election integrity through greater executive involvement in election administration.

In signing it, Trump repeated false claims of widespread voter fraud, specifically allegations that ineligible people were casting ballots and that mail-in voting was being abused.

"Remember, it's about voter integrity. We want to have honest voting in our country because if you don't have honest voting, you can't have, really, a nation, if you want to know the truth," he said.

Acknowledging it will likely be challenged in court, Trump described the order as "foolproof" while expressing frustration that it could be overturned by "a rogue judge."