Paul Ryan is clearly an ambitious man. He either wants to be President or Speaker of the House. That explains why in a recent debate he said didn’t know if humans caused climate change, and that scientists didn’t know either. Such a statement is designed to appeal to the party’s base and to many of its big money donors. Those are two groups Ryan will need if he wants to go further in either pursuit. Which office will he go for? That’s a question we’ll find out soon enough.