Conway: Take Trump's threats to close southern border 'seriously'

White House counselor Kellyanne ConwayKellyanne Elizabeth ConwayOvernight Health Care: Trump officials making changes to drug pricing proposal | House panel advances flavored e-cig ban | Senators press FDA tobacco chief on vaping ban Senators press FDA tobacco chief on status of vaping ban George Conway: 'If Barack Obama had done this' Republicans would be 'out for blood' MORE said Sunday that President TrumpDonald John TrumpGOP senators balk at lengthy impeachment trial Warren goes local in race to build 2020 movement 2020 Democrats make play for veterans' votes MORE is serious in threatening to close the U.S.-Mexico border.

“It certainly isn’t a bluff. You can take the president seriously," she said during an appearance on "Fox News Sunday" when asked by host Chris Wallace whether Trump was "bluffing" when he said he will likely close the border.

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Conway added that Congress "can fix this."

"Congress can fix the problem of immigration that they’ve failed to fix. This president is looking at the metrics," she said, adding that the U.S. has "never seen a surge" in immigration "like this."

Trump said Friday that “there’s a very good likelihood” he will close the entire southern border this week.

The president said that Mexico is "going to have to do something, otherwise I’m closing the border."

"I’ll just close the border. And with a deficit like we have with Mexico and have had for many years, closing the border would be a profit-making operation. When you close the border also you will stop a lot of the drugs from coming in," he added. 

He said in a tweet Thursday that he "may close the Southern Border," adding that Mexico was "doing NOTHING to help stop the flow of illegal immigrants to our Country."