Their case is a sad 'comment' [='commentary'] 'on' the current state of the justice system.
When asked about his involvement in the scandal, he refused/declined to 'comment'.
We let the remark pass without 'comment'. [=we did not respond to the remark]
(..) Not long ago that would have been American men and women risking their lives. To pacify these people. General, care to comment on this? Well, Pat, We had Vietnam, we had Iraq we had Afghanistan, Never again. From a military perspective this has been invaluable. We can accomplish our objectives (..)2014 RoboCop