Career federal employees and U.S. foreign service agents who aren’t on board with President Donald Trump and his agenda should “either get with the program or they can go,” according to White House press secretary Sean Spicer.

Spicer was asked by a reporter Monday about a memo signed by State Department employees opposing Trump’s 90-day ban on travel from seven war-torn African and Middle Eastern nations, and a related 120-day ban on refugees.

“Look at the polls that have come out so far. The American people support what the president is doing.”

Spicer was surprisingly candid in his reply.

“The president has a very clear vision. He’s been clear on it since the campaign,” Spicer said. “He’s been clear on it since taking office, that he’s going to put this safety of this country first. He is going to implement things that are in the best interest of the safety of this country prospectively, not reactively. And if somebody has a problem with that agenda, then that does call into question whether or not they should continue in that post or not.”

Spicer did not say outright that the career federal workers should resign.

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The memo was first reported by ABC News and dug up by CNN. The memo had been circulating for days among foreign service workers and was available on the State Department’s “Dissent Channel,” where workers can express differing views from the political leadership of the administration.

According to CNN, the memo warns that not only will the new immigration policy harm efforts to prevent terrorist attacks, but the ban “will not achieve its stated aim of to protect the American people from terrorist attacks by foreign nationals admitted to the United States.”

The memo also notes that Trump’s list of the seven nations — Iran, Iraq, Sudan, Yemen, Syria, Somalia, and Libya — has produced no major terror attacks on U.S. soil.

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“Given the near-absence of terror attacks committed in recent years by Syrian, Iraqi, Irani, Libyan, Somalia, Sudanese, and Yemeni citizens who are in the US after entering on a visa, this ban will have little practical effect in improving public safety,” the memo says.

Spicer said Trump is merely delivering on a promise to make the United States safe, in a proactive manner.

He also said the critics are out of touch.

“Look at the polls that have come out so far,” said Spicer. “The American people support what the president is doing. Everyone in here needs to get out of Washington once in a while.”