(CNN) Acting Homeland Security Secretary Chad Wolf said Thursday that President Donald Trump's immigration executive order is a first step, teasing additional measures aimed at non-immigrant temporary visas.

"That is something that the department has been looking at for the past several months, so we are well underway and look forward to presenting to the President those recommendations for additional steps," he said during a Fox News interview.

Trump signed his executive order barring some immigration to the United States on Wednesday evening, nearly 48 hours after announcing the move on Twitter.

The order directs the Department of Homeland and Security and the Department of Labor to look at additional recommendations, said Wolf.

After Trump previewed his move in the late-night tweet , the White House was flooded with calls from industry representatives imploring the administration to carve out exemptions for temporary workers, including migrants who work on American farms. The final order excludes temporary guest workers but officials have said a future order could include them.

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