"The President does not have power under the Constitution to unilaterally authorize a military attack in a situation that does not involve stopping an actual or imminent threat to the nation," then-presidential candidate Barack Obama said in December 2007. What a difference a change of job title makes. "Let's just call a spade a spade. A no-fly zone begins with an attack on Libya," said Defense Secretary Robert Gates three weeks before President Obama ordered a no-fly zone over -- and other military action against -- Libya. Like many anti-Iraq War/Bush-is-a-warmonger critics, former House Speaker Nancy Pelosi, D-Calif., supports the...