Senate Minority Leader Chuck Schumer, D-N.Y., speaks to reporters at the Capitol in Washington, Thursday. (AP Photo/J. Scott Applewhite)

WASHINGTON (AP) — A shutdown for the Department of Homeland Security appeared certain Thursday as lawmakers in the House and Senate were set to leave Washington for a 10-day break and negotiations with the White House over Democrats’ demands for new restrictions had stalled.

Democrats and the White House have traded offers in recent days as the Democrats have said they want curbs on President Donald Trump’s broad campaign of immigration enforcement. They have demanded better identification for U.S. Immigration and Customs Enforcement and other federal law enforcement officers, a new code of conduct for those agencies and more use of judicial warrants, among other requests.

The White House sent its latest proposal late Wednesday, but Trump told reporters on Thursday that some of the Democratic demands would be “very, very hard to approve.”

Democrats said the White House offer, which was not made public, did not include sufficient curbs on ICE after two protesters were fatally shot last month. The offer was “not serious,” Senate Democratic Leader Chuck Schumer of New York said Thursday, after the Senate rejected a bill to fund the department.

Americans want accountability and “an end to the chaos,” Schumer said. “The White House and congressional Republicans must listen and deliver.”

Lawmakers in both chambers were on notice to return to Washington if the two sides struck a deal to end the expected shutdown. Sen. Patty Murray, the top Democrat on the Senate Appropriations Committee, told reporters that Democrats would send the White House a counterproposal over the weekend.

Senate Majority Leader John Thune, R-S.D., said after the vote that a shutdown appeared likely and “the people who are not going to be getting paychecks” will pay the price.

The impact of a DHS shutdown is likely to be minimal at first. It would not likely block any of the immigration enforcement operations, as Trump’s tax and spending cut bill passed last year gave ICE about $75 billion to expand detention capacity and bolster enforcement operations.

But the other agencies in the department — including the Transportation Security Administration, the Federal Emergency Management Agency, the Secret Service and the Coast Guard — could take a bigger hit over time.

Gregg Phillips, an associate administrator at FEMA, said at a hearing this week that its disaster relief fund has sufficient balances to continue emergency response activities during a shutdown, but would become seriously strained in the event of a catastrophic disaster.

Phillips said that while the agency continues to respond to threats like flooding and winter storms, long-term planning and coordination with state and local partners will be “irrevocably impacted.”

Trump, who has remained largely silent during the bipartisan talks, noted Thursday that a recent court ruling rejected a ban on masks for federal law enforcement officers.

“We have to protect our law enforcement,” Trump told reporters.

Democrats made the demands for new restrictions on ICE and other federal law enforcement after ICU nurse Alex Pretti was shot and killed by a U.S. Border Patrol officer in Minneapolis on Jan. 24. Renee Good was shot by ICE agents on Jan. 7.

Trump agreed to a Democratic request that the Homeland Security bill be separated from a larger spending measure that became law last week. That package extended Homeland Security funding at current levels only through Friday.

Schumer and House Democratic leader Hakeem Jeffries of New York have said they want immigration officers to remove their masks, to show identification and to better coordinate with local authorities. They have also demanded a stricter use-of-force policy for the federal officers, legal safeguards at detention centers and a prohibition on tracking protesters with body-worn cameras.

Democrats also say Congress should end indiscriminate arrests and require that before a person can be detained, authorities have verified that the person is not a U.S. citizen.