Barack Obama has spent the last year explaining why his lack of experience is an asset for his candidacy for the White House. Experience doesn’t make up for judgment, he has told rapturous audiences. Now, however, his campaign has suddenly balked at looking at Obama’s connections outside the Beltway. Calling that “guilt by association”, they have pushed back against criticism of Obama’s political and personal connections to people like Jeremiah Wright, William Ayer, and Rashid Khalidi. The connection to William Ayers was no accident of geography. for a man who asks us to trust his judgment without having established any...