Sen. Marsha Blackburn’s (R-Tenn.) nascent gubernatorial bid has kicked off a shadow race for her Senate seat in the event she wins, with Reps. Tim Burchett (R-Tenn.) and Andy Ogles (R-Tenn.) each eyeing the seat. Burchett confirmed to The Hill that he would be interested in the Senate seat if Blackburn was elected governor. CNN…