As one Senior Democratic Senator said, (I'm paraphrasing), They have had the power of oversight for about six weeks, and every tree they barked up has had a cat up it.
Lord forbid someone would admit that they were on a fishing expeidition by saying there were no cats.
That is one of the problems that the left faces over things like this. They have been screaming about scandels and secret take overs for so long that it is getting obvious that they are just crying wolf. The very thin reasoning for the moves now make good speculation, but lack realsubstance. They join the conspiracy theories that Bird flu was a way to divert attention away from the war, that the elections were going to be stolen, etc.
I have always had problems with congress pulling some guys up in front of them to show the public that they were going after the big bad softwear makers or whoever was in the publics eye. For you or me, we would need to get a impartial judge to issue summons and such. If the criteria we laid out was not enough for him, no one could be forced to testify. But there is no such oversite in this case. One political party is the ones seeking and serving as judge for issuing them. Once this blatently partisan plan goes through, they may keep using it against others.