President-elect Donald Trump has proposed several economic policies. On spending, Mr. Trump intends to modernize the U.S. infrastructure, including the transportation system and education facilities, and to strengthen the military. On taxes, Mr. Trump intends to decrease both corporate and personal income taxes, simplify the tax code and impose punitive taxes on U.S. businesses who lay off American workers and move the company to a foreign country. Finally, Mr. Trump has vowed to decrease business regulations. Are these economic policies aligned with Mercantilism, Adam Smiths’ Classical Theory or Keynesian Macroeconomics?