WASHINGTON — President Trump vowed to eradicate the notorious MS-13 gang “very soon” during a ceremony at the U.S. Capitol on Monday to honor fallen police officers.

“MS-13 is going to be gone from our streets very soon, believe me,” Trump said to loud applause.

The president has railed against MS-13 in recent weeks, telling National Rifle Association members at a conference last month that he hopes to get the gang “the hell of out here.”

Treasury Department officials labeled MS-13 a “transnational criminal organization” in 2012, noting that its members have been involved in drug trafficking, kidnapping, human smuggling, murder and sex trafficking in the U.S. and several other countries.

“The weak illegal immigration policies of the Obama admin allowed bad MS-13 gangs to form in cities across the U.S.,” Trump tweeted late last month, days after Attorney General Jeff Sessions had suggested that MS-13 “could qualify” for State Department designation as a terrorist organization.

Flanked by Sessions and Homeland Security Secretary John Kelly, Trump told the crowd on Monday that his administration has devoted countless hours already to restoring “law and order and justice” in America and to ensure that law enforcement authorities are respected.

“We are living through an era in which our police have been subject to unfair defamation,” Trump said, adding that “the attacks on our police are a stain on the very fabric of our society.”

Trump signed a proclamation to recognize National Police Week in the Oval Office earlier Monday, during which he said his administration has “had it” with attempts to demonize cops in the United States.

“Some of you have suffered greatly and we’re going to take care of it, OK? We’re going to take care of it,” he said.

The president also announced that the White House will be lit blue on Monday evening to honor hundreds of police officers who’ve been slain in the line of duty.

According to the National Law Enforcement Officers Memorial Fund, 143 police officers died in the line of duty across the US in 2016 — the highest figure since 2011, when 178 officers died.