Legal challenges after Trump declares national emergency

The president's move to bypass Congress has been met with threats of lawsuits, and protests have been planned across the country.
2:41 | 02/18/19

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Transcript for Legal challenges after Trump declares national emergency
We move on to the president who is also facing fall yut from his decision to declare a national emergency at the border. Protests are being planned. And multiple legal challenges ING. Terry Moran right there at the white house. Terry, good morning to you. Reporter: Good morning, Dan. It's day four of this state of emergency in America. The president is in Florida at mar-a-lago. He's done some golfing. He'll be speaking to Venezuelan Americans later. Here in Washington, a major battle. In congrnd the courts. This morning, the white house is gearing up for a legal fight after president trump's decision to declare a national emergency and bypass congress to build his border wall. Can you say definitely that California will be filing a lawsuit and when that will happen? Martha, definitely and imneptly. We're prepared. We knew something like this might happen. And, with our sister state partners, we're ready to go. Reporter: The president's emergency declaration allowing trump to tap into funding from other government agencies, up to $8 billion, the white house says. The move has sparked a bipartisan backlash. This is going to be a moment of truth for my GOP colleagues. Reporter: Now the battle moves to the courts. There, the trump administration may have to demonstrate that this is a bona fide emergency, not a political end-around congress with challenges coming from border states, landowners and others. They're pointing to this. I didn't need to do this. But I would rather do it much faster. How does that justify a national emergency? The president was saying like past presidents, he could choose to ignore this crisis, choose to ignore this emergencying as others have. But that's not what he's to do. Reporter: Over the weekend, the rose garden press conference was mocked on "Saturday night live the." This is a total emergency. A five-alarm blaze. That means I need to go the mar-a-lago and play golf. Reporter: The president tweeted, nothing funny about tired "Saturday night live" how do the net works get away with these total Republican hit jobs. All presidents are mocked. President trump the first to threat. Retribution the. The real issue is his emergency declaration and the fight coming in the court. The problem, Dan, congress over the years gave presidents these emergency powers really with almost no boundaries. Courts are going to be very reluck tat to second-guess a president on national emergency. And congress may try to step in and stop him. They're likely to be vetoed by the president himself.

This transcript has been automatically generated and may not be 100% accurate.

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