President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE on Friday issued a proclamation to Democrats on Twitter, warning Democratic leaders in Congress that he would not accept any legislative solution to protect Deferred Action for Childhood Arrivals (DACA) program beneficiaries without first getting the funding he needs for his promised wall on the Mexican border.

In the tweet, Trump said that Democrats "fully understand" he will not sign any law granting legal protections to DACA recipients, often called "Dreamers," without funding for Trump's signature promise to secure and build a wall along the U.S.'s southern border.

"The Democrats have been told, and fully understand, that there can be no DACA without the desperately needed WALL at the Southern Border and an END to the horrible Chain Migration & ridiculous Lottery System of Immigration etc," Trump tweeted. "We must protect our Country at all cost!"

The Democrats have been told, and fully understand, that there can be no DACA without the desperately needed WALL at the Southern Border and an END to the horrible Chain Migration & ridiculous Lottery System of Immigration etc. We must protect our Country at all cost! — Donald J. Trump (@realDonaldTrump) December 29, 2017

Trump's tweet comes after Democrats in Congress faced sharp criticism from immigration activists and progressive groups for not demanding legislative protection for Dreamers in the year-end bill to fund the government. This came they after previously promised to not leave Washington, D.C., for the holidays without a deal.

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“We will not leave here without a DACA fix,” House Minority Leader Nancy Pelosi Nancy PelosiPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Trump signs largely symbolic pre-existing conditions order amid lawsuit MORE (D-Calif.) said earlier in December.

Left-leaning groups like Credo Mobile and Democracy For America issued statements slamming Pelosi and Senate Minority Leader Charles Schumer (D-N.Y.) for not securing the provision to protect Dreamers in the spending bill.

“For months, Democratic leaders insisted they would use their leverage in year-end spending bill negotiations to protect Dreamers and reauthorize the Children’s Health Insurance Program, but at the end of the day they let us down and refused to even put up a fight," Credo political director Murshed Zaheed said in a statement.

Recipients of DACA, who are immigrants brought to the U.S. illegally as children, received protection from deportation under the law until the program was ended by Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsRoy Moore sues Alabama over COVID-19 restrictions GOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs MORE earlier this year.