Heat Waves and Global Warming

Whenever we have a winter in the Unites States with excessive snow or cold, all the right-wing tea-baggers start spouting off that the weather is proof that global warming is a hoax. Anyone with any intelligence knows that seasons fluctuate and one cold winter doesn't prove anything. But, I have noticed that we have two summers in a row with excessive heat and droughts. So why aren't the right-wing tea-baggers going off about the proof of global warming? Oh, I know, because they are right-wing tea-baggers.