The U.S. government shut down early Wednesday after Congress failed to approve a funding bill, forcing agencies nationwide to halt many operations, furlough hundreds of thousands of employees, and require others to work without pay.
The closure, the first since 2018, began at 12:01 a.m. when efforts to extend federal funding collapsed in the Senate. The Congressional Budget Office estimates that up to 750,000 federal employees could be sidelined each day, with about $400 million in compensation lost daily until the impasse ends.
Wide Service Disruptions
Most national parks, research facilities and cultural institutions will close. Civilian contractors are expected to be heavily affected. Essential services such as border security, law enforcement, air traffic operations and the military will continue to function, though many personnel will not be paid immediately.
At the Transportation Department, more than 12,000 of its 53,717 workers face furloughs. The Federal Aviation Administration is cutting over 11,000 jobs for the period, while more than 13,000 air traffic controllers will remain on duty without pay.
The Department of Health and Human Services expects to sideline 41% of its workforce, while at the Centers for Disease Control and Prevention nearly two-thirds of employees are affected. The National Institutes of Health has suspended a large portion of its research programs. The Food and Drug Administration will retain most of its workforce, while the Centers for Medicare & Medicaid Services will continue with slightly more than half its staff.
Social Security, Medicare and Medicaid payments will continue. However, programs such as nutrition support for women, infants and children (WIC) could face disruption if the closure drags on. The U.S. Postal Service remains unaffected because it is funded separately.

Political Standoff
The shutdown stems from a dispute between Republicans and Democrats over government spending. Republican leaders are pushing for deep cuts to Medicaid and reductions in Affordable Care Act subsidies, as well as broader spending caps. Democrats have rejected these measures, seeking to protect health care subsidies and social safety-net programs.
The White House has also signaled that an extended shutdown could be used to permanently trim the federal workforce and roughly 300,000 civilian positions are projected to be eliminated by the end of the year.
Uncertain Outlook
Financial markets opened weaker as investors reacted to the stalemate, with U.S. stocks slipping and gold reaching record highs. Analysts warn that the absence of key government reports, including monthly jobs and inflation data, will complicate decision-making for businesses and the Federal Reserve.
The duration of the shutdown is unclear. Past closures have lasted from a single day to 35 days, the record set in 2018–2019. With both parties firmly entrenched, a rapid resolution appears unlikely.
For now, federal workers and millions of Americans who depend on government services are bracing for a prolonged period of disruption while political leaders remain deadlocked.