Not trying to be inflammatory but what will you do when your superior officer orders you to uphold sharia law or any law that violates the Constitution?

Are you currently or have you previously upheld any order from a superior officer which violates the constitution of The United States of America, i.e. gun confiscation in New Orleans following hurricane Katrina?

Obviously there is no requirement for any of you to answer but I would really appreciate your reassurance that you would defy those unlawful orders should they come, ... and they will.