What is more concerning?

While reading an article on KSL.com it is interesting to take a look at the situation that was created by the White House when they leaked classified information to build up President Obama's tough foreign policy. The leak contained information about the President's "kill list" that the administration uses to hunt down those unfriendly to the U.S. My question is what is more concerning: the leaks that brought the information, or the fact that the White House has a "kill list"?