A partial US government shutdown has taken effect after US lawmakers failed to break a budget impasse.
Mr. Trump, who has to sign off any deal, is insisting at least $5bn (£4bn) in government funding be included to help build his long-promised US border wall.
Lawmakers adjourned from last-minute talk efforts on Friday evening.
In the absence of an agreement, funding for about a quarter of all US federal agencies lapsed at midnight (05:00 GMT Saturday).
It means the departments of Homeland Security, Transportation, Agriculture, State, and Justice will begin to shutdown and federal national parks and forests will also close.
The partial shutdown, the third of 2018, means hundreds of thousands of federal employees will have to work unpaid or be put on temporary leave.
In a video address published on Mr. Trump’s Twitter account shortly before the shutdown began, the president insisted the onus was on the Democrats to resolve the closure.
Senior Democrats have accused the president of provoking the shutdown with a “temper tantrum”.
OUR GREAT COUNTRY MUST HAVE BORDER SECURITY! pic.twitter.com/ZGcYygMf3a
— Donald J. Trump (@realDonaldTrump) December 22, 2018