Read here. Back in March of 2009, 100+ prominent scientists sent Obama a letter that countered the claims being made by the Climategate scientists. The claims based on the AGW hypothesis were being proven wrong by the actual data and the letter writers went out of their way to provide a fair and accurate warning of the problems with the AGW claims/predictions.
They had identified a "scientific" house-of-cards and stepped up to do the right thing. Unfortunately, neither Obama, nor the "expert" sycophants advising him (the leftist-liberals drooling over new 'cap & trade' revenue streams), listened. At that time Obama could have demanded more and better scientific evidence than just more hype and hysteria. Instead, he ignored the actual science and now the climate science fraud revealed by Climategate has blown up in his face on the eve of Copenhagen. Certainly not the best-of-breed leadership qualities that's needed in today's world.