Mother Jones: One of the most significant obstacles to addressing climate change is the fact that huge numbers of US politicians reject the overwhelming scientific consensus that humans are warming the planet. Why does the situation persist? How can a senator who (literally) holds up a snowball as evidence that global warming is a hoax keep winning reelection? How can someone who declares himself a climate "skeptic" be a front-runner for the GOP presidential nomination? As newly released research from the Yale...