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When President Obama meets President Gloria Macapagal Arroyo of the Philippines today, they are likely to discuss counterterrorism cooperation. Mr. Obama should inquire if Mrs. Arroyo is still taking advice from her former consultant on security and public order, Mayor Rodrigo Duterte of Davao City.

If so, the Obama administration should be wary of associating with people who advocate murder as a means of establishing law and order.