John Yoo would like Barack Obama to know: "I may have just helped save his presidency."

He'd like a little appreciation for "winning a drawn-out fight to protect his powers as commander in chief to wage war and keep Americans safe." Of course, the fight was against the current Executive Branch, including the investigation conducted by the Justice Department's Office of Professional Responsibility:

OPR's investigation was so biased, so flawed, and so beneath the Justice Department's own standards that last week the department's ranking civil servant and senior ethicist, David Margolis, completely rejected its recommendations.

Yoo says he fought for "to help our president—President Obama, not Bush.

If a president cannot, or will not, protect the men and women who fight our nation's wars, they will follow the same risk-averse attitudes that invited the 9/11 attacks in the first place.

Without a vigorous commander-in-chief power at his disposal, Mr. Obama will struggle to win any of these victories. But that is where OPR, playing a junior varsity CIA, wanted to lead us. Ending the Justice Department's ethics witch hunt not only brought an unjust persecution to an end, but it protects the president's constitutional ability to fight the enemies that threaten our nation today.