President Donald Trump on Thursday threatened to invoke the Insurrection Act to send in the U.S. military as tensions intensify in Minneapolis following a second shooting in a week involving a federal officer amid Immigration and Customs Enforcement operations in the city.

“If the corrupt politicians of Minnesota don’t obey the law and stop the professional agitators and insurrectionists from attacking the Patriots of I.C.E., who are only trying to do their job, I will institute the INSURRECTION ACT, which many Presidents have done before me, and quickly put an end to the travesty that is taking place in that once great State,” Trump wrote in a social media post.

On Wednesday night, Deputy Attorney General Todd Blanche said Minnesota Gov. Tim Walz and Minneapolis Mayor Jacob Frey, both Democrats, needed to be stopped from “terrorism.”

“Minnesota insurrection is a direct result of a FAILED governor and a TERRIBLE mayor encouraging violence against law enforcement. It’s disgusting,” Blanche posted on X. “Walz and Frey — I’m focused on stopping YOU from your terrorism by whatever means necessary. This is not a threat. It’s a promise.”

ABC News has reached out to Walz and Frey’s offices for comment on Blanche’s statement.

The deputy attorney general’s blunt post came after Walz earlier on Wednesday evening had issued a sharp rebuke of the federal government’s law enforcement presence after a federal officer shot a person who they said had fled a traffic stop and then, along with two other people, began attacking the officer.

The shooting came one week after Renee Good, a 37-year-old mother, was fatally shot by an ICE agent. The Department of Homeland Security has said that Good was allegedly attempting to run over law enforcement officers, a claim disputed by local officials.

“It’s a campaign of organized brutality against the people of Minnesota by our own federal government,” Walz said in an address on Wednesday. He urged residents to “protest loudly, urgently, but also peacefully.” 

Frey, who has called on ICE to “get the f— out” of Minneapolis, said on Wednesday “the situation we are seeing in our city is not sustainable.”

Trump previously threatened to invoke the 1807 Insurrection Act last summer when protests were unfolding in Los Angeles over the administration’s immigration crackdown and deployment of the National Guard.

The law, which authorizes the use of the military on U.S. soil for certain purposes, hasn’t been enacted for decades. It was last implemented was in 1992 by President George H.W. Bush during the Los Angeles riots at the request of the governor. It hasn’t been used without coordination with a governor since the 1960s.

Overall, the Insurrection Act has been used in response to 30 crises over its history, according to the Brennan Center for Justice, including by Presidents Dwight D. Eisenhower and John F. Kennedy to desegregate schools after the Supreme Court’s landmark ruling in Brown v. Board of Education.

The Insurrection Act states, in part: “Whenever there is an insurrection in any State against its government, the President may, upon the request of its legislature or of its governor if the legislature cannot be convened, call into Federal service such of the militia of the other States, in the number requested by that State, and use such of the armed forces, as he considers necessary to suppress the insurrection.”