NASHVILLE, Tenn. (WTVF) — Early voting in the Republican primary for governor is less than three weeks away. The front-runner, U.S. Senator Marsha Blackburn, is keeping a low profile. She has refused to debate her Republican opponents and is not doing local media interviews. Last week, NewsChannel 5 Investigates caught up with her after an event in Nashville and asked some basic questions before she got onto an elevator. Blackburn had just spoken to the Greater Nashville Technology Council.