Senators also urged BP to suspend its dividend payment to shareholders until Gulf residents were compensated for the spill. They were successful in stopping the company from issuing those checks after BP executives met with President Barack Obama about the matter.
The senators used their letter to Newman to encourage him to follow BP's lead.
"Many things remain unclear about what happened on the Deepwater Horizon," they wrote. "Before your company begins to reward its shareholders, we urge you to follow BP's example by withholding further shareholder rewards until investigations of this matter are complete."