See the top of this thread, oil hit a record high of $147.27 a barrel on July 11th.
President Bush lifted the ban July 14th, and oil has dropped steadily since then:
http://www.washingtonpost.com/wp-dyn/content/article/2008/07/14/AR2008071401049.html
Oil price history:
http://www.nyse.tv/crude-oil-price-history.htm
Direct correlation.
Hey thanks! The RNC and GOP should be playing this up... big time! Nevermind, they’re too stupid to think of that.