Nov. 9 (Bloomberg) -- Bloomberg View columnist Clive Crook presents a commentary arguing that Rubio's position on a carbon tax isn't just in conflict with economic evidence. It's also in conflict with a core principle of his candidacy: that U.S. leadership is a powerful tool for shaping the world, and that Rubio knows how to wield it. This commentary aired on Bloomberg Radio.\u0010\u0010(Clive Crook is a Bloomberg View columnist. The opinions expressed are his own.)