Senators Lisa Murkowski (R-AK) and James Inhofe (R-OK) sent a letter October 24 to Senators Jeff Bingaman (D-NM) and Barbara Boxer (D-CA) requesting the Senate Committees on Energy and Natural Resources and Environment and Public Works to conduct a joint hearing on the causes of the recent surge in California gasoline prices. Senators Boxer and Dianne Feinstein (D-CA) have asked federal agencies to investigate the spikes.