It's by Trudy Rubin, who is very good:
http://www.philly.com/mld/philly/news/columnists/trudy_rubin/16670715.htm...
But Wilson found no evidence of such a sale, nor did the U.S. Embassy in Niger. And from the beginning, CIA analysts doubted the story. The State Department's intelligence arm, which saw the foreign documents that had provoked the story, considered them to be blatant fakes.
And yet the story wouldn't die. Despite the fact that CIA Director George Tenet personally got President Bush to remove a reference to Niger uranium in a 2002 speech, the tale lived on. The reason: relentless White House efforts to promote the story and relentless White House pressure on the CIA to confirm it. Dissenters in the intelligence community were brushed aside.
Bush made the Niger claim a centerpiece of his 2003 State of the Union speech to justify the coming war, citing British intelligence as the source. (The British intel was apparently based on the same set of fake foreign documents.)
...
The difference this time is that the intelligence community is holding firm against promoting claims that aren't fully backed up with reliable data. A new intelligence estimate on Iraq downplays the overall significance of Iranian interference there.
The Libby trial is a salutary reminder that the same leaders who cherry-picked Iraq intelligence are still in the White House. The Niger charge was patently false, yet Bush, Cheney - and Libby - promoted it. Perhaps they auto-hypnotized themselves into believing it. Hopefully, they can't hypnotize the country again.