 which truly is the existential threat of our time. Well, besides this debate, what have these candidates been saying and doing about this existential issue? Well, whatever you make of Biden and his performance in this week's debate, I can't think of a more stark difference on any issue between the two candidates than the issue of climate change in this election. On the basic science, Trump has repeatedly called climate change a hoax created by the Chinese to hurt the U.S. economy.