Simplify the following text for a Grade 6 native English-speaking person.
Original: He was a supporter and friend of Hugh Gaitskell and , when Gaitskell died in 1963 , he was horrified at the idea of Gaitskell 's volatile deputy , George Brown , leading Labor , saying `` He was like immortal Jemima ; when he was good he was very good but when he was bad he was horrid '' .
Simplified: He supported Hugh Gaitskell , the leader of the Labor Party . When Gaitskell died in 1963 , Healey became a supporter of Harold Wilson .