In this Aug. 19 photo, Attorney General William Barr participates in a roll call with police officers from the Kansas City Police Department in Kansas City, Mo. In a private conference call this week with his U.S. attorneys nationwide, Barr said he wanted prosecutors to be aggressive in charging demonstrators who cause violence. (AP photo)

WASHINGTON — In a memo to U.S. attorneys Thursday obtained by The Associated Press, the Justice Department emphasized that federal prosecutors should aggressively go after demonstrators who cause violence — and even sedition charges could potentially apply.

The sedition statute doesn’t require proof of a plot to overthrow the government, the memo read. It instead could be used when a defendant tries to oppose the government’s authority by force.

Attorney General William Barr has been pushing his U.S. attorneys to bring federal charges in protest-related violence whenever they can, keeping a grip on cases even if a defendant could be tried instead in state court. Federal convictions often result in longer prison sentences; sedition alone could lead to up to 20 years behind bars.

The memo cited as a hypothetical example “a group has conspired to take a federal courthouse or other federal property by force,” but the real thing took place in Portland, Oregon, during clashes that erupted night after night between law enforcement and demonstrators.

Justice officials also explored whether it could pursue either criminal or civil rights charges against city officials there, spokeswoman Kerri Kupec told The AP. She would not say whether charges were still being considered.

The Trump administration’s crackdown on protest violence has already led to more than 300 arrests on federal crimes in the protests since the death of George Floyd. An AP analysis of the data shows that while many people are accused of violent crimes such as arson for hurling Molotov cocktails and burning police cars and assault for injuring law enforcement, others are not. That’s led to criticism that at least some arrests are a politically motivated effort to stymie demonstrations.

“The speed at which this whole thing was moved from state court to federal court is stunning and unbelievable,” said Charles Sunwabe, who represents an Erie, Pennsylvania, man accused of lighting a fire at a coffee shop after a May 30 protest. “It’s an attempt to intimidate these demonstrators and to silence them,” he said.

Some cases are viewed as trumped-up and should not be in federal court, lawyers say, including a teenager accused of civil disorder for claiming online “we are not each other’s enemy, only enemy is 12,” a reference to law enforcement.

The administration has seized on the demonstrations and an aggressive federal response to showcase what President Donald Trump says is his law-and-order prowess, claiming he is countering rising crime in cities run by Democrats. Trump has derided protesters and played up the violence around protests, though the majority of them are peaceful.

Pockets of violence have indeed popped up in Rochester, New York; Minneapolis, Washington, D.C., and Chicago. Federal officials were called to Kenosha, Wisconsin, after large protests and unrest following the shooting of Jacob Blake and the gunning down of two protesters and later arrest of a 17-year-old in their deaths. Notably, that teenager has not been charged with any federal crimes. Neither was a man accused of shooting and killing a demonstrator in Louisville following the death of Breonna Taylor.

While Barr has gone after protest-related violence targeted at law enforcement, he has argued there is seldom a reason to open sweeping investigations into the practices of police departments. The Justice Department, however, has initiated a number of civil rights investigations into individual cases. Barr has said he does not believe there is systemic racism in police departments, even though Black people are disproportionately more likely to be killed by police, and public attitudes over police reforms have shifted.

Federal involvement in local cases is nothing new. Officials across the country turn to the Justice Department for violent crime and gang cases where offenders could face much stiffer federal penalties and there is no parole.

Police chiefs in several cities have pointed to the importance of their relationships with federal prosecutors to bring charges that can result in long prison sentences to drive down violent crime.

Even before the unrest earlier this year, the Justice Department was stepping in to bring charges in states where the government believes justice is not being fully pursued by local prosecutors. In January, for example, the department brought federal hate crime charges against a woman accused of slapping three Orthodox Jewish women in one of several apparently anti-Semitic attacks reported throughout New York during Hanukkah.