During the 20th century, the role of the vice president 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.
The development of the vice presidency during the 20th century resulted in its increased integration with the executive branch. As a result, the vice president now plays a crucial role in the president's administration and assumes ceremonial duties or casts tie-breaking votes on rare occasions.