Koch-backed Americans for Prosperity plan $24M swing-state ad buy

A conservative group partially funded by the billionaire Koch brothers is spending approximately $24 million over the next month in swing-state advertisements, according to multiple media reports.

Americans for Prosperity will air ads across 11 swing states between Aug. 8 and Sept. 10, according to ad-spending data from SMG Delta, which works with NBC News.

The ad buy — among the most significant in the race so far — is in addition to $17.6 million that the group has already spent on the presidential race, according to The Washington Post. The ads will air in Colorado, Florida, Iowa, Minnesota, North Carolina, New Mexico, Nevada, Ohio, Pennsylvania, Virginia and Wisconsin.

On Wednesday, the super-PAC supporting President Obama's campaign said they were reserving some $30 million in airtime across six swing states.

But Republicans are likely to dwarf Democratic ad buying efforts. In addition to the Americans for Prosperity buy, the Romney-backing Restore our Future super-PAC is expected to spend aggressively, while outside groups led by former Bush adviser Karl Rove have pledged to spend some $300 million throughout the cycle.

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