Safer never struck me as overtly political. Was he?
He was taking on the US government in a big way during Vietnam. That may have been more generational and adversarial than ideological, more the way reporters made names for themselves by going after the powers that be than an attempt to promote a specific ideological agenda.
Lately, though, and for decades, he seemed to be doing more soft lifestyle and celebrity stories. If he did exposes, they tended to be more of corporate shenanigans than of politicians or political movements. But I didn't watch the show for a long time so I could be wrong.
A lot of people hold the CBS connection against him. Maybe they assume that he didn't have to do the political stories because so many other CBS reporters did. Anyway, he didn't seem to have a secret life, like Charles Kuralt or Steve Kroft, and he never got caught peddling false documents like Dan Rather,
One can start with NewsBusters' "Bye-Bye Morley Safer! The Retiring 60 Minutes Correspondent’s Most Liberal Moments."