Republican Sen. Scott Brown hasn't said whether he'll run for John Kerry's Senate seat, but he's already taking a shot at a possible Democratic rival.
Brown, who lost his re-election battle last year to Elizabeth Warren, questioned how much time U.S. Rep. Edward Markey spends in Massachusetts.
Markey, a Malden Democrat, has said he'll run for Kerry's seat if Kerry is confirmed as secretary of state.
Speaking on WTKK-FM Wednesday, Brown said Democrats are making it tempting for him to run again, pointing to Markey and asking "Does he even live here?"
Markey maintains his boyhood home in Malden, but spends much of his time in Washington and owns a home in Maryland.
Brown said he has been flying home from Washington every weekend for nearly three years and has never seen Markey on an airplane.