The Department of Homeland Security (DHS) reportedly deployed a "crisis action team" after President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE issued his first travel ban last year.

“The National Operations Center (NOC) Crisis Action Team (CAT) activated at 0800 this morning to assist in facilitating DHS response and reactions to the Presidential Executive Order Protecting the Nation from Terrorist Attacks by Foreign Nations,” an email sent to senior DHS officials on Jan. 29 said, according to records obtained by Politico.

A DHS official told the news outlet that the crisis action team is a "mechanism to ensure efficient coordination and communication during events and matters that involve multiple federal, state, local, or private sector response efforts."

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“The CAT is activated in response to a large scale response effort to provide information and decision products to senior leadership," the official said.

Trump issued his first travel ban last January, shortly after taking office. The order was aimed at temporarily banning travel from seven countries while the U.S. government reviewed and strengthened its vetting process.

His order barred people from Iraq, Iran, Syria, Yemen, Libya, Sudan and Somalia from entering the U.S. for 90 days, halted the U.S. refugee resettlement program for 120 days and indefinitely suspended the resettlement of Syrian refugees.

Chaos, protests and legal challenges erupted over the order. A week later, a federal judge in Washington state put the entire travel ban on hold, and a federal appeals court in San Francisco refused to lift the nationwide restraining order against the ban in February.

Still, Trump adviser Stephen Miller said after the ban was issued that it was a "massive success story in terms of implementation on every single level."

Trump has since issued subsequent versions of his travel ban.