Freud wasn’t talking about party primaries when he coined the phrase “the narcissism of small differences,” but he might as well have been. The similarities between Senators Ted Cruz and Marco Rubio are demographic, biographical, and ideological. Both are young Cuban-American conservatives who won election to the U.S. Senate by defeating more established Republican politicians. They agree on nearly everything. Listening to them now, though, you would think their worldviews are fundamentally at odds. Cruz’s version of Rubio is an amnesty-loving warmonger; Rubio’s version of Cruz is a pandering isolationist. In reality, the candidates disagree more on political strategy than on policy.