Washington: Cooped up in the White House over the weekend after cancelling a vacation to his private Florida club, President Donald Trump fired Twitter barbs at Democrats as talks to end a week-long partial government shutdown remained at a stalemate.

As the disruption in federal services and public employees' pay appeared set to continue into the new year, there were no signs of substantive negotiation between the parties. Trump held out for billions in federal funds for a border wall between the US and Mexico, which Democrats have said they are intent on blocking.

Alcatraz Island is shown behind a locks on a pier fence in San Francisco. Some tours to the island have stopped because the ferry is government-run. Credit:AP

Trump tweeted on Saturday that he was "in the White House waiting for the Democrats to come on over and make a deal on Border Security."

But there has been little direct contact between the sides during the stalemate, and Trump did not ask Republicans, who hold a monopoly on power in Washington for another five days, to keep Congress in session.