Conservative media and politicians are having fun showing how ignorant they are of science and basic statistical concepts. It seems that many of them mistakenly believe that record-breaking snowfalls in the Mid-Atlantic and Northeast disprove the concept of global warming.
Earth to Conservatives
The science behind global warming observes that the average temperature on the entire planet has increased and that this increase results from the emission of greenhouse gases. Average global temperatures include localized and annual deviations from that norm. All "averages" include deviations.
Hence, the harshness of winter 2000-2010 in the eastern United States proves NOTHING with respect to global warming. Perhaps conservatives oppose climate control measures because they do not even understand what global warming actually means!
Media Matters has spent much more time debunking this ignorance than I care to do. Here's the link: Brain Freeze: Conservative media still using winter weather to attack global warming.
Update: Some experts believe that harsher winters are in fact a sign of global warming. See: Snowstorm: East Coast Blizzard Tied to Climate Change.