Isn't it possible and actually likely that he gives a shit AND wants to score political points?
Possible? Absolutely. Likely? That's impossible to know without knowing him and his motivations, and I would not call it a reasonable assumption given the generally self-serving state of US politicians (most others as well, but in this case they're the most relevant).
Metaphorically speaking, it sounds like you're convicting the guy without even giving him a trial. The political system is by-and-large a big bowl of FUBAR, but I'd rather see a politician give the other side a dose of their own medicine when something as clandestine as this Datagate (Yes I used the -gate postfix, sue me) scandal happens. Especially given one critical notion very few people seem to be talking about: Why are phone records made by the citizenry deemed worthy of being 'classified' unless the government has some sort of interest other than fighting terrorism that would prevent them from disclosing on their own what they do on our behalf or even the results? If this is so critical to fighting terrorism, show me what you've thwarted.
Oh wait, that's classified too.
Seeing the trend/problem here? I'm absolutely fine with what this Congressman did.