Christian Science Monitor: Green groups are pouring millions into the Michigan Senate race, running TV advertisements about climate change and pollution that attack the Republican and support the Democrat.
But its unclear whether the climate messaging has had any effect. In fact, recent polls show that Democratic Rep. Gary Peters's lead is shrinking, with Republican Terri Lynn Land trailing a mere six percentage points. Other polling indicates the race is even tighter.
So why harp on climate change if its not necessarily...