BOSTON - Marie St. Fleur, a little more than 24 hours after entering the lieutenant governor’s race, decided Wednesday to abandon her campaign after revelations of tax and loan delinquency, according to a top aide to her running mate, Attorney General Tom Reilly. St. Fleur’s financial troubles sparked revelations from another politician in the thick of this year’s gubernatorial campaign: Deval Patrick, Reilly’s top rival for the Democratic gubernatorial nomination, released a statement disclosing that he, too, had been a tax delinquent. “More than a decade ago, Diane and I had an installment agreement with the IRS to pay, on...