Well, google produced no huge surprises. The four Congressmen who were most adamant about lifting the embargo were David Bonior, John Conyers, Dennis Kucinich, and Jim McDermott.
the group Peace Action was working pretty hard to end the sanctions. This group is the merger of SANE and FREEZE, two anti-nuclear groups SANE had been infiltrated by the Soviet agents in the eighties. Infiltration there wouldn't surprise me, but let's not jump to conclusions.
A Quaker group passed a resolution against the sanctions, and the Unitarians tried as well. It's certainly not difficult to get the religious left on your side if you're a foreign dictator.
Ramsey Clark's group was big on trying to get the sanctions removed. And let's not forget Scott Ritter.
In general, the left-wing press was being used by Hussein. A search reveals accounts of left-wing journalists who were being invited into Iraq to see the devastation supposedly caused by sanctions. These journalists somehow missed all the executions and terror. I will post a link if I find it.
Here we go:
http://www.inlander.com/topstory/276107487590407.php
Was this guy completely duped by Hussein or what?