Following the war, Leader began a family-operated chicken
hatchery, and served in leadership positions in the York County Democratic Party. He successfully ran for
Pennsylvania State Senate in 1950, winning the
28th district seat previously held by his father, Guy. In 1952, he ran for
State Treasurer of Pennsylvania. Despite narrowly losing that race, he built name recognition for himself that would be useful for any future run for statewide office. He also increased funding to education, engaged in a highly publicized campaign to reform Pennsylvania's state
mental hospitals, and carved out a role for the state in protecting the
civil rights of African-Americans and other
minorities. As governor, Leader unsuccessfully attempted to create a graduated income tax. , Jerusalem 1956 Leader was unable to run for re-election in 1958 because the Pennsylvania Constitution that was in place at that time
term limited governors to a single four-year term. Instead, he opted to run that year for a seat in the
Senate, a race which he lost to Republican Congressman
Hugh Scott. ==Later life and death==