U.S. Sen. Elizabeth Warren wasted no time seeking campaign cash to boost her re-election bid a day after a cryptocurrency advocate, with an appeals case in the pipeline, was eyeing a run against her.

The potential race between Warren and John Deaton, who could soon announce his campaign as a Republican, heated up after Deaton’s 2017 arrest reemerged — a case that was eventually dropped pre-trial and led the likely candidate to sue the police who booked him, according to federal court documents.

Warren, a second-term Democrat from Cambridge, did not mention the arrest in a fundraising email to supporters Thursday afternoon, though she did take shots at Deaton by describing him as a “big cheerleader for crypto interests.”

“Ever since I began speaking out about protecting consumers from crypto scams and making that industry follow the same basic regulations as banks and all other financial institutions, the crypto lobby has put a target on my back,” Warren wrote in the email.

Deaton, who moved to Swansea from Rhode Island at the start of the year, has publicly addressed his arrest in his memoir “Food Stamp Warrior,” where he alleged a “keystone cop” handcuffed him after the ex-husband claimed that Deaton choked him, according to the book and federal court documents first reported by POLITICO Massachusetts.

Deaton advisor Jim Conroy said Deaton “protected himself against an individual with an outstanding warrant for domestic violence.”

“John was exonerated and the charges were dropped pre-trial. John will never apologize for standing up for women or anyone else,” Conroy said in a statement.

The ex-husband had a warrant for his arrest at the time of the 2017 incident and was taken into custody later that day, though the charges against him were ultimately dropped, according to Rhode Island court records.

Deaton alleged Barrington, Rhode Island, police officers who were involved in his September 2017 arrest violated his civil rights, set up malicious prosecution, invaded his privacy, and were not properly supervised by their higher-ups, court documents said.

Deaton, who was only briefly held in a cell at the Barrington Police Department, argued in court documents that the arrest “caused irreparable harm to his reputation.”

“(Deaton) may be viewed as unstable and too risky to conduct business with,” Deaton wrote. “As a direct and proximate result from defendants’ unlawful arrest of plaintiff, (Deaton) has lost over ($3 million) in wages, has incurred attorney fees, and has suffered humiliation, mental anguish and irreparable harm to his reputation.”

Lawyers for the Town of Barrington and the police department denied nearly all of Deaton’s account, including that he was arrested without probable cause and two responding officers sought out witnesses to justify the arrest after Deaton was released, court documents said.

A federal judge ruled in favor of the Town of Barrington and police officers on most of the charges Deaton brought against them but sent back to state court issues related to municipal liability and failure to supervise. Deaton appealed the ruling and oral arguments were scheduled for Feb. 5, an advisor to Deaton said.

The ex-husband, Ron Warner, claimed Deaton “put his hands on (Warner’s) throat” and assaulted him outside of a high school in Barrington after a football game, according to court records.

An arrest report alleged Deaton was “actively insulting him and taunting” Warner.

“Warner stated that Deaton then got in his face and threatened him. Warner stated that Deaton then went ‘chest to chest’ and when Warner attempted to resist the action, Deaton grabbed him by the throat,” the arrest report said.

But Deaton disputed that, and instead accused Warner of escalating the situation when he ran up “behind me and grabbed me, slapping his hands down on the back of my shoulders,” he wrote in his memoir. Deaton accused police officers of failing to interview potential witnesses.

“With his hands down and slightly behind his back, he slammed his shoulder into my chest, hard. This fool was charging me! I shoved him off with my left hand and stepped back,” he wrote in the book.

Both Deaton and Warner were brought back to the police station, where Deaton was placed in a holding cell and Warner taken to an interview room, according to court documents.

As officers started to question Warner, they found he had a warrant for his arrest — something Deaton says he repeatedly told the arresting officer — stemming from a domestic violence incident involving Warner’s girlfriend, according to court documents.

Warner was “immediately arrested” and transferred to the Providence Police Department, Deaton wrote in court documents. Warner was charged with simple assault and battery, though the case against him was dismissed in November 2017, according to Rhode Island court records.

John Deaton, a cryptocurrency advocate and attorney, is eyeing a run against U.S. Sen. Elizabeth Warren as a Republican. (Courtesy of Deaton Law Firm)