U.S. President Barack Obama plans to hold his first meeting with the co-chairmen of an independent commission investigating the catastrophic oil spill in the Gulf of Mexico. Obama was to meet Tuesday with Bob Graham, a former Florida governor and U.S. senator, and William K. Reilly, a former head of the Environmental Protection Agency, with a statement to reporters afterward, the White House said. The commission's inquiry will range from the causes of the spill to the safety of offshore oil drilling and the functioning of government agencies that oversee drilling, according to a report of the Associated Press.