Some obstacles which prevents third party candidates from winning elections;
Not a well known name, not enough money for campaigning, minority of voters go outside democrats or republicans. However, most of all is the ability to withstand your opponents and go the distance.
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, be elected
Answer:
The different level of government is solely responsible for foreign policy while the state governments and local governments may only make only make domestic policy.
It is true because the popes where in charge of the church