If they really cared, they'd simply use the attorney firing scandal as the decisive piece of evidence for repealing that part of the Patriot Act and getting rid of at least one of this administrations power-grab extensions... then left it at that.
They'd also practice what they preach with lobbyists.
At least on the Leadership level, the Crats have only proven that this should be their slogan:
Democrats: We're the other Republican Party!

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"Man lives in the sunlit world of that which he believes to be reality. But unseen by most is an underworld, a place that is just as real... but not as brightly lit... A DARK SIDE!"
-opening from Tales From the Darkside