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]
(..) - Nothing. It's not you. It's me. I have a fear of commitment. - I don't know how to love. - You hate my earrings, don't you? - No, no. - And you didn't comment... ...on the chopsticks. I love the chopsticks. I personally prefer a fork, but they look very nice. You're not telling me the truth. (..)1991 TvShow: Seinfeld Title: The Truth Season: 3 Episode 2