Back during the anthrax scare of Oct./Nov. 2001, Kristof played a key role in targeting suspicion at Steve Hatfield, who seems to have been totally innocent, but was deemed evil by leftists for having spent some time in Rhodesia before it fell to Mugabe. It ruined Hatfield's career, at least for the time...I don't know if he has recovered from the hit. Meanwhile the actual perpetrators remain at large. Five people died.
Although on the surface it looks like you had Amb. Wilson and his current wive, Val Plame, running an anti-Administration CIA operation, my money's on it being more of a "private thing" which has been worked in collusion with Grassley and possibly another Senator who has a financial interest in whatever it was Wilson was up to.
Other Freepers have posted quite a bit of material already about the possibility Wilson was involved in peddling yellow-cake to Saddam Hussein, and this bit about Grassley and the FBI investigator appeared in a Washington Times article the other day.
Those who've followed me on the Anthrax Attack know I've had my suspicions about Grassley all along.