-G.O.P. allies are driving ad spending disparity. link
-Speaking of political ads, Nancy Pelosi takes a hit (above). link
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-Foursquare co-founder Dennis Crowley will make an appearance at Advertising Week on Sept. 27. link
-John Mayer quits Twitter. Let’s all shed a tear. link
-AOL named former NBC Universal exec Chris Grosso as “homepage GM.” link
More: “Monday Morning Stir”