Closures, Social Security checks, furloughs: What a government shutdown might mean

Congress has until midnight Friday to come up with a way to fund the government or federal agencies will shut down, meaning hundreds of thousands of federal employees could be sent home — or stay on the job without pay — just ahead of the holidays.

Republicans abandoned a bipartisan plan Wednesday to prevent a shutdown after President-elect Donald Trump and billionaire Elon Musk came out against it. Trump told House Speaker Mike Johnson to essentially renegotiate the deal days before a deadline when federal funding runs out.

On Thursday, Republicans did just that, putting together a revamped government funding proposal that would keep the government running for three more months and suspend the debt ceiling for two years, until Jan. 30, 2027. But the bill failed overwhelmingly in a House vote hours later, leaving next steps uncertain.

Here's what to know about a possible government shutdown, what agencies would be affected and how long it could last: