THE PRESIDENT'S FAITHFUL EXECUTION DUTY.

The article discusses the U.S. President's duty to faithfully execute the laws of the nation as of 2016, and it mentions America's separation of powers doctrine, executive power under Article II of the U.S. Constitution, and various interpretations of the presidential execution duty throughout history. American constitutional law is assessed, along with U.S. President Barack Obama's views and those of several ex-leaders such as James Buchanan, Abraham Lincoln, and Benjamin Harrison.