By not turning over a report Congress has requested, the White House is breaking the law and violating the separation of powers doctrine that underwrites America’s constitutional republic.

Days after Washington Post columnist Jamal Khashoggi was lured into the Saudi consulate in Istanbul, Turkey, and brutally murdered in an assassination plot hatched by the Saudi government, the top two lawmakers on the Senate Foreign Relations Committee wrote a letter to President Trump with a straightforward request: Identify any person who was involved in the crime and determine whether these individuals qualified for sanctions designations.