"On January 3, 2002, Director Tenet and other CIA officials briefed the Vice President and his staff on the limitations of covert operations in bringing down Saddam Hussein and explained that only a military operation and invasion would succeed. The CIA then gave the same briefing to the President." (page 452)
What the senators didn't say is that Woodward went on (emphasis added):
"With Tenet's approval, Saul, Deputy Director John E. McLaughlin and James L. Pavitt, the deputy director for operations, worked on a new Top Secret intelligence order for regime change in Iraq that Bush signed on Feb. 16, 2002. It directed the CIA to support the U.S. military in overthrowing Hussein and granted authority to support opposition groups and conduct sabotage operations inside Iraq.
"The cost was set at $200 million a year for two years. The leaders of the Senate and House intelligence committees were informed secretly."
Which means that early in 2002 - over a year before the Iraq war began - Congressional intelligence leaders knew the CIA and the US military intended to overthrow Saddam.
Those leaders? Senate Intelligence chairman, Democrat Bob Graham, Vice-Chairman, Republican Richard Shelby; House Intelligence Chairman, Republican Porter Goss; Ranking Member, Democrat Nancy Pelosi.
Articles: Iraq and Curve Ball Carl