Complex sentence: By February 1963, the organization had grown to hundreds of operatives and activists, and its executive committee decided to go public, with the formation of the National Draft Goldwater Committee, headed by Peter O'Donnell, Jr., then chairman of the Texas Republican Party.
Split into simpler sentences: By February 1963, the organization had grown to hundreds of operatives and activists, and its executive committee decided to go public, with the formation of the National Draft Goldwater Committee. It would be headed by Peter O'Donnell, then chairman of the Texas Republican Party.