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Although President Obama spent much of his first year in office trying to revolutionize the U.S. health care system, the external world often inconveniently intruded. As the attempted Christmas mass murder of passengers flying from Amsterdam to Detroit demonstrates, our adversaries have not been idle. Nor will they be idle in 2010.

A critical question, therefore, is whether the president has learned anything during his first year, or whether he will continue pursuing national security policies that leave us at greater risk. The outlook is not promising. Too often, Mr. Obama seems either uninterested in the global threats we face, unpersuaded that they constitute dangers to the country, or content simply to blame his predecessors.

When he does see international threats,...