Dan Eggen: “President Obama and his allies have aired more ads in battleground states this month than Mitt Romney and his supporters, despite being outspent by the Republican nominee and GOP groups, according to a study released Wednesday. The Obama campaign and its supporters spent $77 million on 112,730 advertisements from Oct. 1 to Oct. 21, according to the Wesleyan Media Project, which tracks and analyzes political ad spending. Romney and his allies, by contrast, spent more money — $87 million — on 15,000 fewer spots than their opponents.”