The first government shutdown in nearly seven years began at midnight after lawmakers failed to reach a deal on extending funding.

The U.S. Senate adjourned Tuesday without reaching a deal on extending federal funding, meaning a federal government shutdown is expected to begin at 12:01 a.m. Wednesday.

Caucus Chairman Pete Aguilar blamed Republicans if the government shuts down. "This is a shutdown they will own, and the American people are paying attention," he said.

The government has officially shut down. The OMB warned that a new wave of federal worker firings could be imminent.

Those programs that rely on mandatory spending also generally continue during a shutdown. Social Security checks continue to go out. Seniors who rely on Medicare coverage can still go see their doctors and health care providers and submit claims for payment and be reimbursed.

A potential shutdown of the U.S. government looms at midnight, as President Donald Trump and members of congress work toward a deal to avert it.

In a highly partisan memo, agencies told workers that "Trump opposes a government shutdown" and that any lapse in funds would be because of "Congressional Democrats."