Conservative commentator Ann Coulter on Thursday slammed the news that President TrumpDonald John TrumpStates slashed 4,400 environmental agency jobs in past decade: study Biden hammers Trump over video of world leaders mocking him Iran building hidden arsenal of short-range ballistic missiles in Iraq: report MORE will sign off on a border security deal brokered by Congress, calling it "selling out" GOP constituents.

"GOP motto: NEXT TIME! We're selling out our constituents this time -- but we'll get to our promises NEXT TIME. We thought Trump was different," Coulter tweeted in response to an announcement from Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellTrump's legal team huddles with Senate Republicans Schumer briefs Democrats on impeachment trial 'mechanics' Trump legal team gears up for Senate impeachment trial in meeting with GOP senators MORE (R-Ky.) that Trump would sign the legislation and declare a national emergency at the border.

McConnell's comments ended speculation over whether Trump would agree to sign the funding deal, which includes $1.375 billion in funding for roughly 55 miles of new barriers along the southern border. 

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The president must sign the bill before the end of the day on Friday to avoid a second government shutdown this year.

The president has for weeks raised the prospect of declaring a national emergency to direct construction of his long-desired border wall. The move is sure to draw legal challenges. Republicans have been reluctant to support an emergency declaration, noting it could set a dangerous precedent for future presidents.

Coulter, who backed Trump in the 2016 election but has been critical of the president over his inability to secure funding for a wall along the southern border, is among the conservatives with hard-line immigration views who have panned the deal reached by Congress.

A number of other conservative commentators have been critical of the agreement, including Fox News host Laura Ingraham, who urged Trump not to sign it.