Which American idea, central to the Declaration of Independence and the social contract theory, is the idea that governments draw legitimacy and power from the governed?

the answer is migration

d: social contract theory

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.