Mulvaney: It would take 'something dramatic' for Trump not to close border

Acting White House chief of staff Mick MulvaneyMick MulvaneyJan. 6 committee issues latest round of subpoenas for rally organizers The Hill's Morning Report - Presented by Alibaba - To vote or not? Pelosi faces infrastructure decision Jan. 6 panel subpoenas 11, including Pierson, other rally organizers MORE said Sunday that it would take "something dramatic" for President TrumpDonald TrumpTrump announces new social media network called 'TRUTH Social' Virginia State Police investigating death threat against McAuliffe Meadows hires former deputy AG to represent him in Jan. 6 probe: report MORE to not shut down the U.S.-Mexico border. 

“Something dramatic,” Mulvaney said on ABC's "This Week" when asked what it would take for Trump not to follow through on his threat of shutting down the southern border entirely.

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“When Jeh Johnson said it’s a crisis, I hope people now believe us. A lot of folks in the media… Democrats didn’t believe us a month ago, two months ago, when we said what was happening at the border was a crisis: a humanitarian crisis, a security crisis,” he said.

“One hundred thousand people coming across the border this month… that is a crisis,” he added.

Trump tweeted twice last week that he could close parts of the border unless Mexico's government immediately stopped illegal crossings.

He also continued blamed Democrats for "weak immigration laws."

The comments came after Customs and Border Protection (CBP) Commissioner Kevin McAleenan said last Wednesday that immigration enforcement has reached a "breaking point."

This is not the first time Trump has threatened to close the border. He threatened in November and in December of last year to do the same.