Its difficult to assume that only Louisiana will be thrown under the bus, even if she will be raped first, there is just something democratic about a massive oil spill the will decimate every gulf State given just a little more time , no matter how massive the BP or Federal government response will be.
The only bright spot may lie in warmer weather, allowing natural processes to biodegrade the oil in a shorter time period than a colder weather place like Alaska.
How long will the oil spill effects the longer term , a decade or more may be an underestimate. And that assumes the top kill or junk shot method can near plug the well now. Failing that, its hard to predict any end in sight.
After all, we are only at week five, and only in the last week has the first of the oil made it to US States, and next week, much more oil will come and keep on coming and coming and coming.