Every inaugural address is part Hallmark card to America: liberty, greatness, unity, democracy, yadda yadda. What people remember (when they do, which is rare) are the phrases that capture the national mood at a particular moment in time. Those phrases stand apart from the enduring clichés that every president summons every four years. And they involve some kind of argument, even a rebuke. Inaugural addresses are not convention acceptance speeches. You can’t skewer your foes. But in defining the moment, you must also define them.