The role of the president has changed as America has increased in prominence on the constitutional enforcement; also congress has reshaped the presidency
Step-by-step explanation:
America through house of representatives elect president of a state. President occupy the seat of power for a certain time period. After that he needs to follow a reelection to be again the president of the country. Constitution followed some sorts of self defined rules and regulations.
Constitutional enforcement make President address more supreme in different domains of decision. Congress has reshaped the president. As congress elect president through the opinion f senate members and house of representatives.