Charles Ellis Schumer is an American politician serving as Senate Majority Leader since 2021 and the senior United States senator from New York since 1999. A member of the Democratic Party, he has led the Senate Democratic Caucus since 2017 and was Senate Minority Leader from 2017 to 2021. Schumer is in his fifth Senate term, making him the longest-serving US senator from New York, having surpassed Daniel Patrick Moynihan and Jacob K. Javits in 2023. He is the dean of New York's congressional delegation.

The positions of majority leader and minority leader are held by two United States senators and people of the party leadership of the United States Senate. They serve as a chief spokespersons for their respective political parties holding the majority and the minority in the United States Senate. They are each elected as majority leader and minority leader by the senators of their party caucuses: the Senate Democratic Caucus and the Senate Republican Conference.