The influential figure remembered for their support in establishing civil rights legislation is Lyndon B. Johnson. As President of the United States, he championed the passage of key legislation, including the Civil Rights Act of 1964 and the Voting Rights Act of 1965. Johnson's commitment to civil rights transformed the political landscape and aimed to eradicate racial discrimination. His efforts to enforce and implement these laws reflected a deep commitment to achieving equality and justice for all Americans, marking a significant turning point in the fight for civil rights.