Thanks to FGI volunteer James Staub letting me know about the Volunteer State database that volunteers campaign finance information:

Tennessee Online Campaign Finance database- Contains financial records that candidates and PACs are required to disclose by law back to 2000. Candidates may be searched by name, party, office sought/held, district, year of election and whether the candidate won a primary or general election.

James Staub also maintains the Tennessee page of State Agency Databases Across the Fifty States.