[Fiji Hill]

In 1967, he fell under attack from the right by opposing the Vietnam War. He was the first American bishop to attempt to implement in a diocese the full teachings of the Second Vatican Council, producing severe criticism from conservatives.

Seems like he moved left as he got older.

[NKP_Vet]

Sheen was never a man of the left. He was Catholic and a very orthodox Catholic. He opposed the Vietnam War because the Vietnam War did not meet Catholic Just War principles. He tried to implement full teachings of the Second Vatican Council because what was exactly what he was supposed to do.