MSNBC co-host and former Republican congressman Joe Scarborough is warning the GOP that President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE's possible declaration of a national emergency over illegal immigration and a border wall could set a dangerous precedent.

During Thursday's "Morning Joe," Scarborough said that a future Democratic president could point to Trump's decision to justify a national emergency declaration over gun violence.

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"And Second Amendment rights supporters should be terrified of the president's order declaring a national emergency, because after the next school shooting any Democratic president could easily look at the precedent, declare a national emergency, immediately put in force national background checks," Scarborough said.

"I mean, the Supreme Court has been completely silent on all of those issues," he continued. "And they've been deliberately silent on all of those issues. ... The precedent that this would set for future Democratic presidents would be extraordinary."

Scarborough's comments echoed a Wall Street Journal editorial from earlier this month in which the paper's conservative editors warned that the right could "live to regret" Trump's idea to bypass Congress and possibly reallocate funds for construction of a border wall through the executive branch.

"If Mr. Trump did win in court, a President Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE might take the precedent as license to circumvent Congress whenever it is politically expedient," the newspaper's editorial board cautioned. "Rising carbon emissions or even income inequality could be declared national emergencies."

Trump hinted earlier this month that a national emergency declaration could be in the pipes if Democrats do not capitulate to his demands for more than $5 billion in funding for the wall.

“I think we might work a deal, and if we don’t, we might go that route,” the president said during a bill signing in the Oval Office.

“This is about the people of our country, and we have to do what’s right at our border and many other places,” he added at the time. "They say it's a medieval solution, a wall. It's true because it worked then and it works even better now."

The president and Congress agreed last week to a three-week measure funding the government to end the longest federal shutdown in history. The new deadline for both sides to reach a deal is Feb. 15.