If the President of the United States opposes a bill passed by Congress, he may veto it. But is he allowed to sabotage through executive action a law passed by Congress and signed by an earlier President? This is the central question in a recently filed lawsuit against the Trump Administration that alleges the Administration has intentionally acted to undermine the signature health insurance reform legislation signed by President Barack Obama. In the lawsuit, five U.S. cities accuse President Donald J. Trump and officials at the U.S. Department of Health and Human Services (HHS) of illegally “sabotaging” the Patient Protection and Affordable Care Act, which is known to some as Obamacare. Citing the Administrative Procedure Act and the U.S....