AUGUSTA, Maine — While Gov. Paul LePage and U.S. Rep.-elect Bruce Poliquin were the ones giving victory speeches after Election Day, it’s arguable that another Republican was an equal winner: political strategist Brent Littlefield. A consultant who crafted the successful campaigns of both LePage and Poliquin, Littlefield proved beyond a doubt in 2014 that he’s got a winning strategy for electing conservative Republicans in Maine. But he’s not telling anybody what that strategy is. “I don’t want to give away the secret sauce just yet,” Littlefield, a Maine native who lives in the Washington, D.C., area, said in a recent...