Washington (CNN) The threat of a partial government shutdown looms over Washington as lawmakers push to extend a spending deadline that is just days away, as Democrats and Republicans debate how to resolve a standoff over President Donald Trump's border wall demand.

On Monday afternoon, House Republicans have filed a continuing resolution to fund the remaining parts of the government until Friday, December 21, two weeks after the current December 7 deadline. The House will still need to pass the extension, as will the Senate, and Trump will need to sign it, a move the President has signaled he's willing to do, not wanting to have a major showdown until after former President George H.W. Bush's funeral proceedings (Congress will be out of session for part of the week because of it).

A stop-gap funding measure could temporarily delay a spending showdown. But Democrats and Republicans appeared to be at an impasse over the President's promise of a border wall, raising the question: which side will blink first?

Trump wants $5 billion in funding for the wall and Senate Republicans are now weighing the possibility of attempting to allocate $5 billion over the next two years. Any spending bill would need at least some Democratic votes to pass, however, and could not be enacted without some degree of bipartisan support.

Senate Democratic Leader Chuck Schumer said last week that Trump should either agree to enact an existing Department of Homeland Security funding bill that has bipartisan support in the Senate and would allocate $1.6 billion for border security or keep DHS funded for another year via a short-term spending measure known as a continuing resolution.

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