Besides the moral questions, the essential rift is based on whether Saddam was an imminent threat to the US and it's citizens. A lot of evidence points against that theory.
http://www.ccmep.org/2002_articles/Iraq/101002_corn.htm
This is a quote from the article:
"The bottom-line: Saddam is not likely in the near future to hit the United States or share his weapons with al Qaeda or other anti-American terrorists, unless the United States assaults Iraq. This is hardly the picture the President is sharing with the American public. "
http://news.bbc.co.uk/1/hi/world/mid...st/2312369.stm
http://www.guardian.co.uk/usa/story/...808970,00.html
This is a quote from the above article:
"President George Bush's attempt to maintain public support for military action against Iraq has taken a fresh blow from an unexpected quarter, with the publication of a letter from the CIA stating that while Saddam Hussein poses little threat to America now, a US invasion could push him into retaliating with chemical or biological weapons."
It is all moot at this point anyway. Saddam is evil, our troops are there, so let's get him out of power as quickly as possible, hopefully by killing him.