March 23 (UPI) -- President Donald Trump's border czar Tom Homan has confirmed that Immigration and Customs Enforcement agents will be deployed to U.S. airports starting Monday, despite strong opposition from unions and Democrats.

Homan told CNN's State of the Union on Sunday that he was working on the plan's execution with acting ICE Director Todd Lyons and Transportation Security Administration Administrator Ha Nguyen McNeill.

"So, we'll put together a plan today and we'll execute it tomorrow," he said.

On Sunday, Trump threatened to send ICE agents to U.S. airports over a protracted fight with Democrats over Department of Homeland Security funding.

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