As oil continues to gush unabated into the Gulf of Mexico, liberals are seizing the moment to press for energy reform. Some of the partisan debate has to do with capping oil companies' liability for spills (some Republicans want to raise the cap; some Dems want no cap at all  it higher). But then there's Americans United for Change's new ad, which will run on cable through May 25 for $50,000, which does the good old-fashioned job of accusing the other side of corruption and pointing out contributions from the oil industry: