The new senators were sworn into office by Vice President Kamala Harris, just hours after her own inauguration. With Harris serving as the tie breaker in her constitutional role as President of the Senate, Democrats gained control of the Senate, and thereby full control of Congress for the first time since the 111th Congress ended in 2011. Additionally, with the inauguration of Joe Biden as president that same day, Democrats assumed control of the executive branch as well, attaining an overall federal government trifecta, also for the first time since the 111th Congress.
