Jennifer Rubin: The president doesn't need to have committed a crime to be impeached

President Trump’s lawyer John Dowd argued that a president cannot obstruct justice because he is the chief law enforcement officer. (It sounds better in French - ” L’etat c’est moi!”) He was swiftly denigrated by lawyers and lay pundits, who pointed out that “several court cases and articles of impeachment — as well as, in the words of one expert, ‘common sense’ ” — suggest otherwise.However, it’s also important to recall th