They each had a duty to pardon Snowden, as he showed the American public incontrovertible evidence that the US Government is violating the Constitution by spying on Americans.
He could have done that without exposing so much of, say, the Special Collection Service.
That's exactly who he should have been spotlighting. The Five Eyes is an egregious Orwellian contruct, and STATEROOM is integral to its continued existence.