Some scientists have come up with an interesting idea for closing the gaping hole in the ocean floor that is leaking thousands of gallons of oil a day into the Gulf of Mexico... Detonating a nuclear weapon underneath the ocean floor.
(my linking ability is not working, sorry)
http://blog.foreignpolicy.com/posts/2010/05/18/nuking_the_gulf_spill
Admittedly these are scientists, not politicians, so the political ramifications are not considered in this proposal, nor are the other potential environmental effects of such a plan.
However, considering that the safest way to contain nuclear material is in glass, and the temperature of a nuclear explosion would surely heat the sand on the ocean floor to class, it isn't that preposterous of an idea as it initially sounds.
http://www.thedailybeast.com/blogs-and-stories/2010-05-16/nuke-the-oil-spill/
http://trueslant.com/juliaioffe/2010/05/04/nuke-that-slick/
http://www.youtube.com/watch?v=7ojCbqfRRr8
Though still probably very unrealistic.