http://www.outsidethebeltway.com/archives/2007/10/ron_paul_leads_military_donations_race/
There was a recent poll on Fox news that stated that in Iowa, 50% wanted to immediately withdraw troops and 31% wanted to stay. 19% were undecided.
This was among Registered (basically hard-core) Republicans. Since the party has lost a lot of people, many are independent now.
A large majority of Dems want out of the war, so 70% of the American People seems accurate to me.
But, hey, you can always search in Google and do the research yourself.