AP: Democratic Senate hopeful Gov. Joe Manchin takes up a rifle in a TV ad to show voters in his coal-mining state how much he opposes his own party’s climate change legislation. Manchin and Republican industrialist John Raese unveiled new ads over the weekend in their race to fill the shoes of the late Sen. Robert C. Byrd. In “Dead Aim,” Manchin loads a hunting rifle and fires a shot into a target labeled “Cap and Trade Bill.” He also touts his National Rifle Association …