With Ohio’s 18 electoral votes very much in play, the Mitt Romney campaign aims to blunt one of Barack Obama’s key advantages in that state -- his rescue of the auto industry. The carmakers account for about one out of eight jobs there, and many Ohio assembly line workers are backing Obama for a second term. The Romney campaign has produced a controversial ad that argues Romney would be better for the auto industry than Obama. In the ad, an announcer says, "Obama took GM and Chrysler into bankruptcy and sold Chrysler to Italians ...