Washington, D.C. does not create great men and women. It can sometimes reveal greatness. But for those who stay too long, Washington makes great people small and petty; and small, petty people unsightly shells. In Lord of the Rings terminology, it is the one ring to rule them all. And John McCain has worn the ring too long. It has distorted the courageous and selfless airman and POW he once was into a mere shadow of that man, driven to maintain the power, influence and affirmation of the entrenched power structure in D.C. — and in doing so undermining the...