Donald Trump used a speech at a Republican Jewish convention Saturday to promise the reimposition of a controversial travel ban that targeted a slew of mostly Muslim countries if he gets re-elected.

“We will keep radical Islamic terrorists the hell out of our country,” Trump told the audience attending the annual summit of the Republican Jewish Coalition.

“You remember the travel ban? On day one I will restore our travel ban.”

At the start of his presidency in 2017, Trump imposed sweeping restrictions on the entry of travelers from Iran, Libya, Somalia, Syria, Yemen, and, initially, Iraq and Sudan. The order was quickly challenged in court as discriminatory against a religious group, but the bans, along with Trump’s hard-line anti-immigration agenda, were popular with his base.

President Joe Biden reversed the ban in his first week in office in 2021.