SALT LAKE CITY — Republican presidential candidate Mitt Romney is taking a new approach to hammering Pres. Barack Obama and campaigning in Iowa. Romney seems to be choosing his words more carefully as he verbally attacks Obama, Politico concludes in an article published Thursday. The piece compares a Romney campaign stop in Pennsylvania last month with his visit Wednesday to Southern California. "Romney spoke Wednesday in front of a long-defunct mall near Los Angeles, and repeatedly pointed out that the mall's closure wasn't entirely Obama's fault. 'Obviously, the challenges here are not all the result of the current administration,' Romney...