A federal judge in California on Wednesday ordered President Donald Trump's administration to halt mass layoffs of federal workers during a partial government shutdown while she considers claims by unions that the job cuts are illegal.

US President Trump is open to negotiations, but both sides remain inflexible, complicating efforts to resolve the shutdown.

The last government shutdown was also the longest in U.S. history, lasting 34 days. It occurred during President Donald Trump’s first term.

Since the shutdown began Oct. 1, the Federal Aviation Administration has reported controller shortages in cities across the U.S., from airports in Boston and Philadelphia, to control centers in Atlanta and Houston. Flight delays have spread to airports in Nashville, Dallas, Newark and more.

Most of the government shutdowns since 1977 have ended within a week or less, congressional records show. This is the fourth government shutdown to occur under President Donald Trump, but the first of his second term. The longest shutdown in U.S. history happened in 2019, during Trump’s first term.

Get the latest Trump administration news as the government shutdown continues. House Speaker Mike Johnson said this could become the longest shutdown in U.S. history.

Major airports across the country -- including in New York City, Chicago and Atlanta -- are refusing to play a video featuring Department of Homeland Security Secretary Kristi Noem blaming Democrats for the impacts of the government shutdown.