Answer: Not Many.
According to Dick Cheney in 1994. Watch this video. You may not recognize the man being interviewed. He discusses Iraq with clarity and shows an understanding of the factional tensions that would make undertaking regime change there a folly.
What changed between 1994 and 2003 for Mr. Cheney?
In 1995 he became CEO of Halliburton.
In 1997 he helped to found the Project for a New American Century.
In 2001 he became vice president of the United States.
Which led to this: