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, AP reported. 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. In a sign of an increasingly assertive administration role, Attorney General Eric Holder also planned to visit the Gulf Coast Tuesday to see areas affected by the oil spill and to meet with state attorneys general and U.S. prosecutors. Several senators have asked the Justice Department to determine whether criminal or civil laws were broken in the spill. The Justice Department has told Sen. Barbara Boxer, who heads the Senate's environment committee, that it has ordered BP PLC not to destroy documents that could be relevant in an investigation. -- SPA