From Wikipedia:
According to The New York Times, "he [Saddam] murdered as many as a million of his people, many with poison gas. He tortured, maimed and imprisoned countless more. His unprovoked invasion of Iran is estimated to have left another million people dead. His seizure of Kuwait threw the Middle East into crisis. More insidious, arguably, was the psychological damage he inflicted on his own land. Hussein created a nation of informants — friends on friends, circles within circles — making an entire population complicit in his rule".[9] Other estimates as to the number of Iraqis killed by Saddam's regime vary from roughly a quarter to half a million,[10][11] including 50,000 to 182,000 Kurds and 25,000 to 280,000 killed during the repression of the 1991 rebellion.[12][13] Estimates for the number of dead in the Iran-Iraq war range upwards from 300,000.[14]

WMD's do not have to be nukes. You do know that, right? Poison gas is also WMD.

When I was in Iraq, a mass grave was discovered. At that time, they estimated over 200,000 bodies. Some say there were more than 400,000. I didn't count them.

The CBO figures show the total cost of Iraq operations in 2008 was $140 billion. In 2007, the cost of Iraq operations was $124 billion.
According to the CBO, Estimated funding for the war in Iraq totals $709 billion from 2003 to 2010. Bear in mind that this is not the total defense budget. Just the funding for the war in Iraq. Not Afghanistan.
According to nationalpriorities.org the current cost of the Iraq war from 2003 to today is $818 billion.

But this is totally off track. The subject of this thread was regarding the multitude of taxes, not a diversion from the left to Bush's war. You can quote long term costs of war, after the war if you wish. If you want to, you can count the long term (still being paid) costs of the Vietnam war.