Mitt Romney, "Crushed By Your Policies"

What it says: President Obama says, “So, if somebody wants to build a coal-powered plant, they can – it’s just that it will bankrupt them.” The narrator adds, “Obama’s kept that promise and Pennsylvania coal paid the price.” 

What it means: Romney's campaign is arguing that Pennsylvania is in play, in part due to the coal mining industry. The ad uses a quote from a 2008 interview in which Obama discussed a proposal that did not become law. However, the Obama administration has pursued policies that have made it harder to mine and burn coal in the United States.

 Who will see it: Pennsylvania.