The National Rifle Association is running a new ad in Wisconsin. It's like the old "this is your brain on drugs" PSA, but this time, the fried egg is your brain "after politicians scream nonstop for two years" and a hunter without a rifle is "your freedom if Tom Barrett gets a chance to recall your gun rights. Any questions." The NRA, apparently, has given Barret, the Milwaukee mayor and Democratic challenger to Gov. Scott Walker, an "F" rating.