Final answer:
The majority party in the U.S. Senate is the party with the most members and more than 50% of the seats. They have certain advantages, like setting the schedule for bills and having more seats on legislative committees.
Step-by-step explanation:
The majority party in the U.S. Senate is the party with the most members. This means that the party that holds more than 50 percent of the seats in the Senate is considered the majority party. The majority party has certain advantages, such as setting the schedule for bills and having more seats on legislative committees.