The ads both attack the Democratic candidates in each state — former U.S. Surgeon General Richard Carmona in Arizona and Rep. Joe DonnellyJoe DonnellyOvernight Finance: Senate punts on Zika funding | House panel clears final spending bill | Biz groups press Treasury on tax rules | Obama trade rep confident Pacific deal passes this year Overnight Healthcare: Lawmakers leave for summer without approving new Zika funds Dems block defense spending bill for second time MORE in Indiana — for what they characterize as the candidates' comfort with raising taxes and support for President Obama's healthcare reform law.
But they also each assert that supporting the Democratic candidate would mean "a U.S. Senate controlled by liberals," as the ad running in Indiana states.
"Do you know that a vote for Carmona is a vote to put liberals in charge of the U.S. Senate?" the Arizona ad asks.
It's an interesting tactic, as the Senate currently has a Democratic majority. But it also might work in red-leaning states like Indiana and Arizona, where Mitt Romney has led Obama by double digits in a number of polls.
The Club for Growth boosted both Rep. Jeff FlakeJeff FlakeVulnerable GOP senators praise Kaine GOP Sen. Flake offers Trump rare praise Booker denounces ‘lock her up' chants MORE (R-Ariz.) and Indiana State Treasurer Richard Mourdock (R) in their primaries with endorsements and funds, and both are running tight races against their Democratic challengers in states Republicans believe could help them regain a majority in the Senate.