Democrats note that the industry has pumped nearly $200,000 into Brown's campaign. The industry's main lobbying group also ran ads recently urging voters to ask Brown to oppose measures the industry said would raise taxes on energy producers.
Brown defended his vote, saying ending subsidies won't bring down gas prices. He said the bill was designed to help Democrats craft political ads instead of addressing the nation's energy woes.
"If you want to have a conversation about our tax code and subsidies that entities are getting, sure let's have that, but let's have that as part of an overall reform and review policy, not just pitting up things for commercials in November," Brown said Friday after touring a fire station in Boston.
Scott Brown with his employer one of the Koch Brothers. Votes like these are what makes him into a Koch nephew.