tonight, celebrity dr. oz facing growing questions about his residency as he campaign force senate in pennsylvania despite owning a mansion in new jersey. high stakes race testing whether voters put party loyalty above, well, someone really truly lives in their state. out front on the ground with tonight s inside look. reporter: all politics is local but some candidates are putting that principle to the test by crossing state lines in search of elected office. take pennsylvania where the senate republican primary field is shaping up to include several candidates with loose ties to the keystone state, including celebrity heart surgeon oz. a long time resident of new jersey. i think he is a carpet bagger. he is from new jersey. he should run in new jersey. if he is from new jersey, why is he running, you know, in pennsylvania? oz declined an interview request for this story, but a campaign spokesperson told cnn he returned to pennsylvania last