Christopher Monckton, 3rd Viscount Monckton of Brentley, who is well known as a Global Warming skeptic, puzzle dork, and former policy advisor to the Iron Lady, has issued a demand (PDF) to Senators Snowe and Rockefeller: Disavow and apologize for the letter you sent to ExxonMobil in October, or resign.
I have, of course, already dispatched my reply.