WASHINGTON — Roger J. Stone Jr., a self-proclaimed political “dirty trickster” and an informal adviser to the president, will strongly deny to congressional investigators on Tuesday that he worked with Russians to aid President Trump’s campaign.

“I do not engage in any illegal activities on behalf of my clients or the causes in which I support,” Mr. Stone said in prepared remarks to the House Intelligence Committee, a copy of which was obtained Monday by The New York Times. “There is one ‘trick’ that is not in my bag, and that is treason.”

Mr. Stone is scheduled to be interviewed by the committee behind closed doors in its continuing investigation of Russian interference in last year’s presidential election.

His prepared remarks amount to a combative and meandering defense, complete with exhibits intended to bolster his case — a touch more fitting to a courtroom than a closed-door interview with investigators. Though the opening statement presents little new information from Mr. Stone, who has for months caustically denied any involvement in the election meddling, it comes with added weight: Lying to Congress is a crime.