Is the U.S. President Above the Law?

On June 4, President Trump tweeted that the President has the absolute right to issue pardons, even to himself. The President’s claim came close on the heels of the New York Times’s publication of a letter two White House attorneys had sent months earlier to Robert Mueller, the Special Counsel appointed to investigate links between Trump’s election campaign and the Russian government. The lawyers argued that the President’s firing of FBI Director James Comey could not constitute obstruction of justice, because the President is the chief law enforcement officer of the nation, and can fire the FBI Director for any reason at all. Can it really be the case that the President of the United States is above the law?