Unjustified war and unconstitutional abridgment of individual rights, versus ill-conceived tax and economic policies -- this is the difference between venial and mortal sins. John McCain would continue the Bush administration's commitment to interventionism and constitutional over-reach. Obama promises a humbler engagement with our allies, while promising retaliation against any enemy who dares attack us. ... Based on his embrace of centrist advisers and policies, it seems likely that Obama will turn out to be in the mold of John Kennedy, who was fond of noting that 'a rising tide lifts all boats.' ... Even if my hopes on domestic policy are dashed and Obama reveals himself as an unreconstructed, died in the wool, big government liberal, I'm still voting for him.