Good question. I can only speculate. First, I think the Democrats are getting extremely frustrated and angry at hitting brick walls every time the take on George Bush. He outwits and outmaneuvers them at every turn. It's doubly frustrating because they were convinced that Bush was a fumbling, bumbling idiot who barely knew enough to come inside when it was raining. When people are extremely frustrated and angry, they do stupid, desperate things.
Secondly, I think the Democrats are looking for anything to "pay back" the GOP for daring to impeach Clinton. It's not enough to bottle up Bush's agenda in the Senate, as Daschle is doing. They want a scandal they can use to bring down Bush. In their haste to tie Enron around Bush's neck, they neglected to consider the possibility that they would be unsuccessful in that endeavor, but instead might reap the unlikely consequences that they would be tieing Enron around their own necks. The presstitutes have been working 24/7 to help the Democrats in this regard, but so far, it's just not sticking and finally the presstitutes are reaching a crossroads. Do they want to continue beating on Enron even though deeper investigation is pointing clearly to improprieties in Clinton's dealings with Enron? Tough choice. Each Enron rock that is turned over seems to have a bunch of worms under it and the faces on lots of those worms are that of Clinton.
Feel free to add to my speculations.