The press is reporting that the top military leaders have “endorsed” President Obama’s Afghan troop withdrawal decision. With all due respect to the fine reporters, that is not the news. Under our Constitution, military leaders have no choice but to endorse the president’s decision after giving him their best advice. They could resign, of course, but to have the entire senior military leadership resign over a president’s decision contrary to their advice would be a disaster, and not least for the troops on the ground. Make no mistake, however. The entire military leadership believes the president’s decision is a mistake,...