The bill then went to conference committee, as the House and Senate attempted to reconcile the differences between their two versions of the bills. Sen. Richard Lugar (R-IN), chair of the Senate Foreign Relations Committee, held the bill in this committee over concerns relating to divestment.[1] The bill was approved by the Senate in revised form on 21 September and passed the House in revised form on 25 September.[2] Shortly thereafter, California Gov. Arnold Schwarzenegger issued a public letter to President Bush urging him to sign the bill,[3] and many members of Congress did the same.