Yes, the midwest gets oil from Canada while we ship US oil elsewhere.
http://www.allgov.com/ViewNews/US_Oil_Exports_Reach_Record_Highs__Thats_Right__Exports_110905
According to the U.S. Department of Energy, American exports of crude oil and refined petroleum products are higher than theyve ever been. In April of this year, oil companies sold nearly three million barrels overseaswhich was double the amount sold four years earlier (April 2007).
Are you suggesting that the oil companies are exporting oil that should go to domestic consumption thereby driving up the price?