Horror author Stephen King on Wednesday tore into President TrumpDonald John TrumpTrump watching 'very closely' as Portland braces for dueling protests WaPo calls Trump admin 'another threat' to endangered species Are Democrats turning Trump-like? MORE about his request for funding a wall on the U.S.-Mexico border.

King, a frequent Trump critic, called on the president to “do something good for once,” and suggested that he use the $5 billion requested for the wall to feed at-risk children or provide medical care for veterans.

“F--- your wall,” King tweeted. “Split that 5 billion between at-risk children who don’t have lunches and vets who can’t get proper medical and psychological treatment.”

“F--- your vanity project. Do something good for once.”

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Trump is engaged in a battle with Democratic congressional leadership over whether upcoming government spending legislation will include $5 billion that he is demanding to build the wall.

Democrats have said they will not support any bill that contains more than the previously agreed-upon $1.6 billion for border security.

The negotiations escalated Tuesday in a face-off in the Oval Office between Trump, House Minority Leader Nancy PelosiNancy PelosiAre Democrats turning Trump-like? Pelosi hits Trump, Netanyahu for 'weakness' amid tensions over Omar and Tlaib In Hong Kong, the need for peaceful persistence MORE (D-Calif.) and Senate Minority Leader Charles SchumerCharles (Chuck) Ellis SchumerAppropriators warn White House against clawing back foreign aid Colorado candidates vying to take on Gardner warn Hickenlooper they won't back down Trump ahead of New Hampshire speech: Lewandowski would be 'fantastic' senator MORE (D-N.Y.).

During the sit-down, Trump repeatedly threatened a partial government shutdown if he does not get the requested funding. Congress has until Dec. 21 to pass legislation and avert a shutdown.