DJ, didn't McCloskey begin his congressional career by defeating Shirley Temple Black in 1967 in a special election. If so, who held that seat previously? Only you would know!!!
Yes, he did indeed defeat Ambassador Black. The GOP incumbent, J. Arthur Younger, an 8-term member, had died in office in June 1967. I'm unaware of Younger's leanings, though I doubt he was nowhere near as leftist as McCloskey.