Last month, Barack Obama defended a speech he gave, one that resulted in an accusation by Hillary Clinton that he had plagiarized an almost identical speech previously given by Massachusetts Gov. Deval Patrick. The thrust of the speech, in which he repeated famous phrases of speeches given by Presidents John F. Kennedy and Franklin Roosevelt, Rev. Martin Luther King and others, was that words do matter. And he is absolutely correct. Obama was baptized in Rev. Jeremiah Wright’s Chicago-based Trinity United Church of Christ. Wright has been Obama’s and his wife’s minister and spiritual advisor for 20 years. He has...