Lyndon B. Johnson
Johnson began a "war on poverty". He created the Great Society (a series of government programs intended to improve the living standards of the country).  These programs include public broadcasting, protecting the environment, Medicare (health care for the elderly), Medicaid ([health care for the poor).  He supported civil rights for African Americans and continued where Kennedy left off in giving them freedom. The Voting Rights Act in 1965 gave the government powers to stop them from being denied the right to vote. Compared to Kennedy's weak relationship with Congress, Johnson was able to convince politicians to support some of the same policies which they opposed under Kennedy.