Has Rep. Darrell Issa (R-CA) turned the House Oversight Committee into a bank lobbying firm with the power to subpoena and pressure government regulators? ThinkProgress has found that a Goldman Sachs vice president changed his name, then quietly went to work for Issa to coordinate his effort to thwart regulations that affect Goldman Sachs’ bottom line.

In July, Issa sent a letter to top government regulators demanding that they back off and provide more justification for new margin requirements for financial firms dealing in derivatives. A standard practice on Capitol Hill is to end a letter to a government agency with contact information for the congressional staffer responsible for working on the issue for the committee. In most cases, the contact staffer is the one who actually writes such letters. With this in mind, it is important to note that the Issa letter ended with contact information for Peter Haller, a staffer hired this year to work for Issa on the Oversight Committee.

Issa’s demand to regulators is exactly what banks have been wishing for. Indeed, Goldman Sachs has spent millions this year trying to slow down the implementation of the new rules. In the letter, Issa explicitly mentions that the new derivative regulations might hurt brokers “such as Goldman Sachs.”