Michele Bachmann buying surgically in Iowa

According to a source familiar with her latest ad purchases, Bachmann has bought new time starting July 20 and running through Aug. 2.

In Des Moines, there's a $3,600 buy on broadcast during that time, $10,500 on cable and $8,570 for radio, the source said. In Cedar Rapids, another market that can be a driver toward Ames, there's no broadcast but there's $7,000 on cable TV and roughly $5,000 on radio, per the source.