monty21,
At least you recognize it for what it is, speculation; it is amazing how many believe that what is only a market related price is set by fundamentals and high probability expectations.
'Market related' means that the modern oil price regime is one of formula pricing in which multiple grades of crude oils are set +/- in reference to a few (3) benchmark crudes which prices are not determined by supply/demand but by financial markets.
One can argue that financial markets efficiently capture present and future realities, which is also to argue the impossibility of bubbles. But heck, since we know very well that bubbles form, the efficient market type arguments fall on their face.
What could Congress do?
Sit on its thumbs until this bubble pops*, and then attempt to take credit for the drop.
More seriously, it could put end to the swaps dealers position limit exemption which has allowed long only index funds to pour in since particularly late 2003. Alongside this, force these funds back into normal limits.
It could try to end the inter-market trade, aka Enron Loophole, which it only pretended to do with the attachment to the recent Farm Bill.
It could rewrite the Commodity Futures Modernization Act of 2000, which both of the above are related too.
It could take a very close and public look into the activities of Goldman, Morgan Stanley, Barclays, et al. A strong light would, I believe, expose, well, more than most might want to see.
*(a popping that will itself have negative consequences for oil exporting nations and, possibly, U.S. credit markets. That is, a price drop back into the range some old oil hands think reasonable would not be an unmitigated plus)