I find great irony in the push for offshore drilling. As schools are being held accountable for improving numeracy in our students some political leaders seem to be lacking in that exact same skill when proposing policy decisions.
Offshore drilling sites wouldn't be online until 2017 (according the US Energy Information Administration), then would only fill 1.2% of the U.S.'s expected demand for oil, and 0.6% of the demand for energy.
What I find frustrating is that this isn't simply an environmentalist vs. big oil argument. The proponents of drilling are proposing the hypothesis: "Offshore drilling will reduce costs and the need for foreign oil." Look at the data. Does it seem likely that this hypothesis will be validated?
Chart and data from Architecture 2030 via Treehugger