"The executive Power shall be vested in a President of the United States of America. He shall hold his Office during the Term of four Years, and, together with the Vice President, chosen for the same Term,"
There U.S. constitution has not set forth in detail the method of selecting a president and their vice. The constitution is also silent on most of the most politically vital features of presidential elections especially the issue of who votes for presidential electors and the counting of the votes. The founding father's, left these key aspects of presidential election for the state to make the decision.