What to know about the Homeland Security shutdown starting this weekend

Another shutdown for parts of the federal government is expected this weekend as lawmakers debate new restrictions on President Donald Trump's immigration enforcement agenda.

Funding for the Department of Homeland Security is set to expire Saturday. Democrats say they won't help approve more funding until new restrictions are placed on federal immigration operations after the fatal shooting of Alex Pretti and Renee Good in Minneapolis last month.

The White House has been negotiating with the Democrats, but the two sides failed to reach a deal by the end of the week, guaranteeing that funding for the department will lapse.

Unlike the record 43-day shutdown last fall, the closures will be narrowly confined, as only agencies under the DHS umbrella — like Immigration and Customs Enforcement and Customs and Border Protection — will be affected. Still, depending on how long the shutdown lasts, some federal workers could begin to miss paychecks.

Services like airport screening could also suffer if the shutdown drags on for weeks.

At the Transportation Security Administration, about 95% of employees are deemed essential. They will continue to scan passengers and their bags at the nation's commercial airports. But they will work without pay until the funding lapse is resolved, raising the possibility that workers will being calling out or taking unscheduled leave. Many TSA workers already faced financial stress last year.

''Some are just now recovering from the financial impact of the 43-day shutdown'' said Ha Nguyen McNeill, a senior official performing the duties of TSA administrator. ''Many are still reeling from it.''

Essentially, it's because Trump acquiesced to Democrats' request that Homeland Security funding be stripped from a broader spending package to allow more time for negotiation over demands for changes to immigration enforcement, like a code of conduct for federal agents and a requirement that officers show identification. Homeland Security was temporarily funded only through Feb. 13.

The rest of the federal government is funded through Sept. 30. That means most federal programs are unaffected by the latest shutdown, including food assistance, and pay for most federal workers and for service members will continue uninterrupted.

What agencies are impacted?

The funding lapse affects the Department of Homeland Security and its constellation of agencies, including U.S. Immigration and Customs Enforcement, U.S. Customs and Border Protection, the Secret Service and the Federal Emergency Management Agency.

The vast majority of employees at the Secret Service and U.S. Coast Guard will continue their work, though they could also miss a paycheck depending upon the shutdown's length.

Republicans have pointed out that the work of ICE and CBP will mostly continue unabated during a shutdown, despite Democratic demands for changes at those agencies.

That's because Trump's tax and spending cut bill passed by Republicans last year provided ICE with about $75 billion and CBP with about $65 billion, money those agencies can continue to tap for Trump's deportation operations.

What is the impact on workers?

It's up to each federal agency to designate which of its employees are ''essential'' or ''excepted,'' both of which mean the same thing in this case. They keep working during a shutdown, typically without getting paid until government funding is back in place.

Some examples of ''essential'' employees are military personnel, security screeners at airports and law enforcement officers. There can be a wide range, from positions deemed critical for public safety to those authorized by law to continue even without new funding.

Lawmakers have been particularly concerned about the potential impact on the TSA and airports.

Senate Republican Leader John Thune has warned that ''there's a very good chance we could see more travel problems'' similar to last year's shutdown. As staffing shortages grow, airports may reduce the number of open security lanes or close checkpoints altogether to relieve pressure on an already strained workforce.

During last year's lapse in funding, unpaid TSA workers increasingly called in sick or stayed home as missed paychecks made it harder for workers to cover basic expenses. The strain was visible on the ground: About a month into the shutdown, TSA closed two checkpoints at Philadelphia International Airport.

''The longer the shutdown goes on, the more severe the impact on our TSA workforce,'' the agency said at the time.

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