National guard arrives in DC as mayors warn of Trump power grab

National guard troops began to arrive at their headquarters in Washington DC on Tuesday as Democratic mayors warned Donald Trump against expanding his law and order power grab in other major cities.

The US president announced on Monday that he was sending the national guard into the nation’s capital and putting city police under federal control, even though the violent crime rate is at a 30-year low.

“We have other cities also that are bad,” he told reporters, citing the Democratic strongholds of Chicago, Los Angeles and New York. “And then, of course, you have Baltimore and Oakland. You don’t even mention them anymore, they’re so far gone.”

Related: ‘Hyperbolic and false’: Trump’s portrayal of crime in Washington DC has little to do with facts

Stephen Miller, an influential White House deputy chief of staff, stepped up the rhetoric on Tuesday, tweeting without evidence: “Crime stats in big blue cities are fake. The real rates of crime, chaos & dysfunction are orders of magnitude higher. Everyone who lives in these areas knows this. They program their entire lives around it. Democrats are trying to unravel civilization. Pres Trump will save it.”

All five cities named by Trump are run by Black mayors. Most were outspoken in denouncing the president’s move. Brandon Johnson, Chicago’s mayor, said in a statement: “Sending in the national guard would only serve to destabilize our city and undermine our public safety efforts.”

Brandon Scott, the mayor of Baltimore, said: “When it comes to public safety in Baltimore, he should turn off the right-wing propaganda and look at the facts. Baltimore is the safest it’s been in over 50 years.”

Barbara Lee, the mayor of Oakland, wrote on X: “President Trump’s characterization of Oakland is wrong and based in fear-mongering in an attempt to score cheap political points.”

Karen Bass, the mayor of Los Angeles, where troops were sent earlier this month in a crackdown on protests, posted: “Another experiment by the Administration, another power grab from local government. This is performative. This is a stunt. It always has been and always will be.”

Trump took command of the Washington DC police department and deployed the national guard under laws and constitutional powers that give the federal government more sway over the nation’s capital than other cities. But Democrats raised concerns that Washington DC could be a blueprint for similar strongarm tactics elsewhere.

Christina Henderson, a Washington DC at-large councilmember, told CNN on Tuesday: “I was listening to the president’s press conference yesterday, and I think it should be concerning to all Americans that he talked about other cities.

“The District of Columbia, for decades, without statehood, has always been used as a petri dish, where Congress or the federal government is trying out ideas here. So, I would hope that folks don’t lose sight of what’s happening in the district. And even if they don’t live here, they fight hard with us.”

California governor Gavin Newsom warned that Trump “will gaslight his way into militarising any city he wants in America”.

JB Pritzker, the governor of Illinois, insisted that the president “has absolutely no right and no legal ability to send troops into the city of Chicago, and so I reject that notion”.

He added: “You’ve seen that he doesn’t follow the law. I have talked about the fact that the Nazis in Germany in the ’30s tore down a constitutional republic in just 53 days. It does not take much, frankly, and we have a president who seems hell-bent on doing just that.”