He was elected in 1968 after being Secretary of State for two years. He served one term his predecessor was Roger Branigan and his successor was Otis Bowen the Bremen Demon.
I was born in Fort Wayne in 1965... no wonder I missed him. I do remember Otis Bowen, at least the name!
I remember him distinctly because my girlfriend fainted in his outer office when we were there visiting (she was too nervous to eat breakfast that day). I grabbed her as she fell on me and he rushed over and helped me get her into a private office where she could lay on a couch. Seemed like a really nice guy to me.
Clinton might have done the same, but for a different reason ("Here, her clothes are on too tight. You go get some water and I'll loosen these up.").