Try reading something from someone who actually worked on the intelligence issues, like this analyst from the Clinton Administration. The Intelligence Community believed Saddam had revived his WMD program at least as far back as 1998. Bush 43 saw the same reports that Clinton did.

The U.S. intelligence community's belief that Saddam was aggressively pursuing weapons of mass destruction pre-dated Bush's inauguration, and therefore cannot be attributed to political pressure. It was first advanced at the end of the 1990s, at a time when President Bill Clinton was trying to facilitate a peace agreement between Israel and the Palestinians and was hardly seeking assessments that the threat from Iraq was growing.

In congressional testimony in March of 2002 Robert Einhorn, Clinton's assistant secretary of state for nonproliferation, summed up the intelligence community's conclusions about Iraq at the end of the Clinton Administration:

"How close is the peril of Iraqi WMD? Today, or at most within a few months, Iraq could launch missile attacks with chemical or biological weapons against its neighbors (albeit attacks that would be ragged, inaccurate, and limited in size). Within four or five years it could have the capability to threaten most of the Middle East and parts of Europe with missiles armed with nuclear weapons containing fissile material produced indigenously—and to threaten U.S. territory with such weapons delivered by nonconventional means, such as commercial shipping containers. If it managed to get its hands on sufficient quantities of already produced fissile material, these threats could arrive much sooner."

In October of 2002 the National Intelligence Council, the highest analytical body in the U.S. intelligence community, issued a classified National Intelligence Estimate on Iraq's WMD, representing the consensus of the intelligence community. Although after the war some complained that the NIE had been a rush job, and that the NIC should have been more careful in its choice of language, in fact the report accurately reflected what intelligence analysts had been telling Clinton Administration officials like me for years in verbal briefings.

The problem with intelligence estimates are that they're often little more than educated guesses based on the best information available, no matter how incomplete.