President Donald Trump. Image courtesy Reuters

U.S. President Donald Trump has again threatened to shut down the border with Mexico over illegal immigration if Congress fails to fund his proposed wall.

“Either we build (finish) the Wall or we close the Border,” the US president tweeted after nearly a week of deadlock in Washington over the federal budget.

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Confirming the threat to close the border was real, the White House said negotiations with Congress had stalled.

The dispute has caused a partial US government shutdown.

Both Congress chambers met for just a few minutes on Thursday but took no steps to end the closure. The House and Senate will now meet again on Monday.

In October, Trump made a similar threat to close the southern US border when demanding action from Latin American governments to stop migrants, in what has become known as the caravan, trying to cross into the US illegally.