Washington (CNN) Washington is on the brink of a partial government shutdown, with funding set to expire for several key federal agencies at midnight on Friday and no guarantee that lawmakers can come up with a plan that President Donald Trump will support to extend the rapidly approaching deadline.

For now, it looks like the President is unwilling to back down from his demand for $5 billion for his long-promised border wall . Democrats have made clear that figure is a nonstarter, however, leaving Congress at an impasse over the wall.

If a shutdown were to take place, it would be limited in scope. That's because lawmakers have already funded roughly 75% of the federal government through September 2019.

But if lawmakers can't strike a deal with the President, there are still a number of government entities that would be affected by a lapse in funding, including:

The Department of Homeland Security.

The Justice Department.

The Interior Department.

The State Department.

The Department of Housing and Urban Development.

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