Obama was hunkering down Saturday in Virginia to go over the game plan for the town-hall debate with Romney. But his weekly radio and Internet address on Saturday spoke of an industry that’s critical to Ohio, another battleground state and perhaps the most important to his Republican opponent’s White House hopes…

Obama and top aides plan hours of practice sessions ahead of the town hall-style event, including some mock exchanges with Sen. John Kerry, D-Mass., who is playing the role of Romney.

Campaign officials sought to keep details of Obama’s preparations secret. But they said the president was working on being more aggressive in responding to Romney and calling the Republican out on issues as well as pointing out what they maintain are Romney’s true position