Simplify the following text for a Grade 12 native English-speaking person.
Original: In 1964 , Robinson became one of six national directors for Nelson Rockefeller 's Republican presidential campaign and later became special assistant for community affairs when Rockefeller was re-elected governor of New York in 1966 .
Simplified: In 1964 , Robinson became one of six national directors for Nelson Rockefeller 's Republican presidential campaign . He later became special assistant for community affairs when Rockefeller was re-elected governor of New York in 1966 .