Trump said in an interview with Fox News’s Laura Ingraham the day before that he had pressured Riyadh to compensate the U.S. for a recent deployment to the Middle East.

“We have a very good relationship with Saudi Arabia. I said, listen, you’re a very rich country. You want more troops? I’m going to send them to you, but you’ve got to pay us. They’re paying us. They’ve already deposited $1 billion in the bank,” he said.

“He sells troops,” Amash tweeted in response.