Thomas Knutson is a climate modeller at the US Geophysical Fluid Dynamics Laboratory, a division of the National Oceanic and Atmospheric Administration (NOAA). In 2004, he published a paper suggesting that increases in atmospheric carbon dioxide would lead to more intense hurricanes. This finding was subsequently supported by independent research. Knutson was invited to discuss his thesis on Ron Reagan's MSNBC talk show, but the invitation was withdrawn after the White House intervened.
Source: New Scientist Magazine 2007-02-03, p. 5