I’ve never written a column like this. Readers rarely believe it, but I am not on any political team. Generosity toward the high and mighty isn’t among my few virtues. But this needs to be said: Americans are lucky to have Barack Obama as president and we should wake up and appreciate it while we can. President Obama will go down in history as an extraordinary president, probably a great one. He will have done this in an era that doesn’t aggrandize leaders and presidents, but shrinks them. All presidents have had profound opposition, vicious enemies and colossal failures. A...