‘Dirty energy’ could propel Romney to White House

Is Barack Obama sufficiently dirty to win re-election? Not according to presumptive Republican nominee Mitt Romney, who says the president is too spic and span.
Calculating that clean energy is passé among Americans more concerned about jobs and their own pocketbooks, Romney is gambling he can tip swing voters his way by embracing dirtier air and water if the tradeoff is more employment and economic growth.