Charles Jarvis, CEO of USA Next, likes to compare the conservative seniors group that he leads to David and the 35-million-member AARP to Goliath. So it probably shouldn't be a surprise that late last month, USA Next flung a rock at the enormous seniors lobby, in the form of an incendiary internet ad. The rock missed its Goliath but infuriated the Philistine army standing behind him. The ad ran for one weekend, Feb. 19-20, on the website of the American Spectator, a conservative magazine. (WORLD's website, worldmag.com, turned down the ad.) It was one of eight USA Next ads on...