Many critics have focused upon administration officials' past relationship with energy sector corporations. Both George W. Bush and Dick Cheney were formerly CEOs of oil and oil-related companies such as Arbusto, Harken Energy, Spectrum 7, and Halliburton. Before the 2003 invasion of Iraq and even before the War on Terror, the administration had prompted anxiety over whether the private sector ties of cabinet members (including National Security Advisor Condoleezza Rice, former director of Chevron, and Commerce Secretary Donald Evans, former head of Tom Brown Inc.) would affect their judgment on energy policy.