Which of the following american presidents was elected to four terms and served 12 years—the longest presidency in american history? a. george washington b. thomas jefferson c. abraham lincoln d. franklin delano roosevelt

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.