Barack Obama is a great pretender. He constantly says he's doing things that he isn't, and he relies on his powerful rhetoric to obscure the difference. He has made "responsibility" a personal theme, and the budget's cover line is "A New Era of Responsibility." He claims that the budget begins "making the tough choices necessary to restore fiscal discipline." It doesn't. If Obama were "responsible," he would be leading a candid conversation about government's size and role. Who deserves support and why? How big can government grow before higher taxes and deficits harm long-term economic growth? Although Obama claims to...