President Barack Obama has finished the second leg of his international confession tour. In less than 100 days, he has apologized on three continents for what he views as the sins of America and his predecessors.

Mr. Obama told the French (the French!) that America "has shown arrogance and been dismissive, even derisive" toward Europe. In Prague, he said America has "a moral responsibility to act" on arms control because only the U.S. had "used a nuclear weapon." In London, he said that decisions about the world financial...