President Donald Trump on Monday doubled down on his call for undocumented immigrants who enter the United States illegally to be sent back to their native countries without any due process before an American judge.

Trump first made the claim in a Sunday tweet following his Saturday contention during remarks before the Nevada Republican Party that Democrats want to open the southern border so the violent MS-13 gang can spread “all over our country.”

The president in recent days has ratcheted up his immigration rhetoric in a clear sign he wants to make it part of his and the GOP’s midterm election message. On Friday, a White House official did not dispute that, but noted the party has other items to tout like the economy and its tax cut bill.

[House GOP ‘Uphill Fight’ on Immigration About More Than Trump]

But during remarks Saturday in Las Vegas, the president said he intends “to use this issue — and I like the issue for [the] election, too.”