WASHINGTON (AP) — The nation's capital sued to block President Donald Trump's takeover of its police department in court on Friday, hours after his administration escalated its intervention into the city’s law enforcement by naming a federal official as the new emergency head of the department.

Washington’s police chief said Trump's move would threaten law and order by upending the command structure. “In my nearly three decades in law enforcement, I have never seen a single government action that would cause a greater threat to law and order than this dangerous directive,” Chief Pamela Smith said in a court filing.

The legal battle playing out Friday showed the escalating tensions in a mostly Democratic city that now has its police department under the control of the Republican presidential administration that exists in its midst. Trump’s takeover of the police department is historic yet had played out with a slow ramp-up in federal law enforcement officials and National Guard troops to start the week.

As the weekend approached, though, signs across the city — from the streets to the legal system — suggested a deepening crisis over who controls the city’s immigration and policing policies, the district’s right to govern itself and daily life for the millions of people who live and work in the metro area.

At a Friday afternoon hearing for the District’s request for a temporary restraining order against sidelining Smith, U.S. District Judge Ana Reyes indicated the law likely doesn’t allow the Trump administration power to fully take over city police, but it probably does give the president more power than the city might like.

“The way I read the statute, the president can ask, the mayor must provide, but the president can’t control,” said Reyes, nominated to the bench by Democratic President Joe Biden.

An attorney for the Trump administration, Yaakov Roth, said in court that the move to sideline Smith came after an immigration order that still held back some aid to federal authorities. He argued that the president has broad authority to determine what kind of help police in Washington must provide.

Washington’s top legal official was pushing in court to reverse U.S. Attorney General Pam Bondi's order Thursday to put the head of the Drug Enforcement Administration, Terry Cole, in charge of Washington police.

District of Columbia Attorney General Brian Schwalb argues the president’s role is narrow under the law, limited to requiring the mayor to provide police services for federal purposes. He wrote in court filings that the police takeover is illegal and threatens to “wreak operational havoc."

The police takeover is the latest move by Trump to test the limits of his legal authorities to carry out his agenda, relying on obscure statutes and a supposed state of emergency to bolster his tough-on-crime message and his plans to speed up the mass deportation of people in the United States illegally.

It also marks one of the most sweeping assertions of federal authority over a local government in modern times. While Washington has grappled with spikes in violence and visible homelessness, the city’s homicide rate ranks below those of several other major U.S. cities, and the capital is not in the throes of the public safety collapse the Trump administration has portrayed.

The president has more power over the nation’s capital than other cities, but D.C. has elected its own mayor and city council since the Home Rule Act was signed in 1973.

Trump is the first president to exert control over the city’s police force since it was passed. The law limits that control to 30 days without congressional approval, though Trump has suggested he’d seek to extend it.

Bondi’s directive came even after Smith had told MPD officers hours earlier to share information with immigration agencies regarding people not in custody, such as someone involved in a traffic stop or checkpoint. The Justice Department said Bondi disagreed with the police chief’s directive because it allowed for continued practice of “sanctuary policies,” which generally limit cooperation by local law enforcement with federal immigration officers.

Bondi said she was rescinding that order and other MPD policies limiting inquiries into immigration status and preventing arrests based solely on federal immigration warrants. All new directives must now receive approval from Cole, Bondi said.

Washington Mayor Muriel Bowser pushed back Thursday, writing on social media “there is no statute that conveys the District’s personnel authority to a federal official.”

Meanwhile, immigrant advocates in Washington were trying to advise immigrants on how to respond to the new policies. Anusce Sanai, associate legal director for the Washington-based immigrant nonprofit Ayuda, said they're still parsing through the legal aspects of the policies.

“Even with the most anti-immigrant administration, we would always tell our clients that they must call the police, that they should call the police," Sanai said. “But now we find ourselves that we have to be very careful on what we advise.”

Amy Fischer, an organizer with Migrant Solidarity Mutual Aid, said that before the federal takeover most of what they had seen in the nation’s capital was Immigration and Customs Enforcement targeting a specific individual. But since last Friday night they’ve seen a “really significant change,” she said, with ICE and federal officers doing roving patrols around the city.

She said a hotline set up by immigration advocates to report ICE activity “is receiving calls almost off the hook.”

ICE said in a post on X that their teams had arrested “several” people in Washington Friday. A video posted on X showed two uniformed personnel putting handcuffs on someone while standing outside a white transport van.

A population already tense from days of ramp-up has begun seeing more significant shows of force across the city. National Guard troops watched over some of the world’s most renowned landmarks, and Humvees took position in front of the busy main train station. Volunteers helped homeless people leave long-standing encampments — to where was often unclear.

Twenty federal law enforcement teams had fanned out across the city Thursday night with more than 1,750 people joining the operation, said a White House official, speaking on the condition of anonymity to discuss the operation. They made 33 arrests, including 15 migrants who did not have permanent legal status, the official said. Others were arrested on warrants for murder, rape and driving under the influence.

Department of Homeland Security police stood outside Nationals Park during a game Thursday between the Washington Nationals and the Philadelphia Phillies. DEA agents patrolled The Wharf, a popular nightlife area, while Secret Service officers were seen in the Foggy Bottom neighborhood.

"I always feel safe in every quadrant and every ward of this city,” said Anthony Leak, a lifelong Washingtonian. He attended the Nationals game Thursday and said he didn’t think the presence of federal agents meaningfully changed the regularly rowdy scene of sports fans and lively bars.

As the District challenged the Trump administration in court Friday, more than 100 protesters gathered less than a block away in front of police headquarters for a rally, chanting "Protect home rule!” and waving signs saying “Resist!"

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Associated Press writers Alanna Durkin Richer, Matt Brown, Ashraf Khalil, Michael Kunzelman, Rebecca Santana and Will Weissert in Washington and Adriana Gomez Licon in Fort Lauderdale, Fla contributed.