WASHINGTON — President Trump said Wednesday he wants “long-term extensions” on federal authority over DC police and plans to submit the request to Congress — vowing the capital will become a “beacon” for New York and other cities after his crackdown.

“We’re going to need a crime bill that we’re going to be putting in, and it’s going to pertain initially to DC… and we’re going to be asking for extensions on that, long-term extensions, because you can’t have 30 days,” Trump said while unveiling this year’s Kennedy Center honorees.

“We are going to do this very quickly, but we are going to want extensions. I don’t want to call a national emergency. If I have to, I will. But I think the Republicans in Congress will approve this pretty much unanimously.”

Trump said his legislative request will include funding for the “finest grasses” in city parks and asphalt for crumbling roads, along with expanded anti-crime powers.

The president asserted emergency control Monday over DC’s 3,400-officer Metropolitan Police Department, citing high-profile violent crimes, but his power is limited to a 30-day period under the Home Rule Act of 1973 unless Congress authorizes an extension.

About 670 federal law enforcement personnel joined 750 DC police officers and 30 National Guard troops on the ground patrolling the District Tuesday night, according to the White House — making 43 arrests and seizing seven illegal guns.

More than 400 National Guard troops are expected on patrol Wednesday night. 

“People are feeling safe already. I’ve had so many calls. ‘Thank you, sir, thank you.’ They were afraid to walk out. They’re not afraid anymore. And this will be like the border,” Trump said.

“This is going to be a crime-free area. By the way, you’ll be able to go out. People tell me they can’t run anymore. They’re just afraid, and they’ll be running again.”

US Attorney Jeanine Pirro on Tuesday demanded policy changes that would undo parts of DC code allowing judges to set aside jail time for defendants under 25, to release offenders after 15 years’ incarceration, and to seal criminal records.

The city’s elected mayor, Muriel Bowser, a Democrat, said in her own press availability that those proposed measures may be submitted to the DC Council.

Trump also has announced plans for federal legislation to override state and local laws barring judges from imposing bail on criminal defendants — with Rep. Elise Stefanik (R-NY) poised to lead that effort.

It’s unclear whether bail reform would be included in any federal legislation pertaining to DC, which faces difficult odds in Congress due to the 60-vote Senate requirement for most bills.

Congress has unique powers over the District’s local laws and budget and in the past has curtailed local initiatives — including continuing a ban on the regulation of recreational marijuana stores via spending bill amendments.

In addition to anti-crime measures, advocates have called for relaxing laws that severely restrict otherwise law-abiding DC residents from possessing weapons such as firearms and even high-strength pepper spray.

“For too long, Washington DC’s restrictions have left residents and visitors in a state of permanent vulnerability,” said Bryan Ganz, CEO of Bryna Technologies, which makes pepper spray and “less-lethal” pistols designed to injure but not kill assailants.

“Blocking access to life-saving self-defense options is a permission slip for criminals, removing any deterrent factor.”

Bowser and DC Police Chief Pamela Smith have — at least publicly — welcomed Trump’s surge of hundreds of federal law enforcement officers and National Guard members to temporarily support local police.

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But Bowser objected during a Wednesday webcast to Trump’s rhetoric about safety in DC — making reference to the president’s Monday suggestion he may raze “slums” that are home to criminals.

“We don’t live in a dirty city. We are not 700,000 scumbags and punks. And we don’t have neighborhoods that should be bulldozed,” the mayor said

Trump has justified his unprecedented intervention by citing high-profile recent crimes in DC, including the Aug. 3 attack on former Department of Government Efficiency staffer Edward Coristine, 19, during an alleged attempted carjacking and the July 1 murder of congressional intern Eric Tarpinian-Jachym, 21, in a drive-by shooting.

Bowser, in turn, has pointed to official city statistics indicating that violent crime is at a 30-year low — a notion scoffed at by Trump, who has cited a scandal that erupted last month when DC police commander Michael Pulliam, whose district included the densely populated Adams Morgan and Columbia Heights neighborhoods, was suspended for allegedly falsifying crime data to make trends appear more positive.

DCs police union, which supports Trump’s takeover, accused MPD leadership of ordering subordinates to falsify violent crime data for political reasons.

“We’re going to do something, and that’s going to serve as a beacon for New York, Chicago, Los Angeles and other places all over the country,” Trump said two days into his crackdown.

“Our whole country is going to be so different and so great — going to be clean and safe and beautiful, and people are going to love our flag more than they’ve ever loved it.”