Senator McCain and White House Press Secretary Jay Carney traded insults this week over intelligence leaks – McCain called the Obama White House “grossly irresponsible” to leak classified information for political gain, while Carney called McCain “grossly irresponsible” for even suggesting it.

I’ve been in three presidential administrations, and frankly, leaks are par for the course.

Some insiders leak to make themselves look good, others to curry favor with the press, still others because they disagree with a policy decision and want to expose its flaws. And sometimes it’s vengeance, pure and simple.

When a president orders an investigation to uncover a leaker, he usually ends up regretting it.

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