Data: AdImpact; Note: "Campaigns" include spending by candidates or in coordination with party committees; "Outside groups" includes spending by non-candidate groups and party committees; Chart: Axios Visuals
Republicans have handily outspent Democrats on political advertising in Tennessee this cycle.
By the numbers: Republican campaigns and groups have dropped nearly $16.4 million compared to $4.2 million for Democrats.
Zoom out: Both totals pale in comparison to spending in swing states. In North Carolina, for instance, Democrats spent $273.3 million while Republicans spent $187.9 million.