Beatty, a former Army Delta Force officer who has also worked at the FBI and CIA, ran against Rep. Bill Delahunt (D-Mass.) last year, taking just less than 30 percent of the vote.
Against Delahunt, Beatty raised less than $50,000 and loaned his campaign almost $50,000 toward the end. He failed to file a year-end financial report, according to FEC records.
Beatty will make the announcement at 6:45 p.m. in Bourne, Mass.