Campaign ad spending: Before and after Super Tuesday

GlobalPost

With 10 states voting in primaries that have 437 delegates at stake and no clear winner, the Republican presidential candidates and the super PACs that support them flooded the airwaves with ads.

According to NPR, the GOP candidates have spent approximately $12 million in ads in the states that will be voting today: Alaska, Georgia, Idaho, Massachusetts, North Dakota, Ohio, Oklahoma, Tennessee, Vermont, Virginia, Wyoming.

More on GlobalPost: Super Tuesday: Rundown of today's ballots

Restore Our Future, the super PAC that supports tentative frontrunner Mitt Romney, has spent $6.9 million in the Super Tuesday states, according to data from the Federal Election Commission. Winning Our Future, which backs Newt Gingrich, and Red, White and Blue, which backs Santorum, are the second and third biggest spenders, according to NPR.

Meanwhile, CNN noted that a majority of the ads running in Ohio, one of the key states in this round of primaries, are negative. Analysis by Kantar Campaign Media Analysis Group showed that a majority of the ads are negative, with the super PACs supporting Santorum and Gingrich releasing "exclusively negative" ads in Ohio.

According to the media analysis group's data, the only positive spots were from the Romney campaign and the pro-Romney super PAC, but they still only accounted for 13 percent of Romney's campaign ads and 16 percent of Restore Our Future's ads.

One of the ads the pro-Santorum super PAC ran in Ohio drew parallels between Romney and President Barack Obama, saying, "How can Mitt Romney beat Barack Obama, when on the vital decisions they're not much different?"

More on GlobalPost: Ohio primary up for grabs as Super Tuesday looms

However, even as voting draws to a close in the Super Tuesday primaries, the ads won't stop. Politico reported that the super PACs supporting Romney and Gingrich had already spent around $3 million on post-Super Tuesday ads.

Restore Our Future has reportedly booked $711,948 in broadcast and cable ads in Alabama and $554,753 in Mississippi while Gingrich's super PAC has spent $416,095 in Alabama TV and radio time and $249,069 in Mississippi, said Politico.

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