When a politician acts in an apparently stupid way, like claiming that "this snowball disproves global warming!", it's probably more useful to consider why they're doing that, rather than just point and laugh at teh stupid.

They might, for example, be a sociopath who is busy lying to a certain set of people in a carefully calculated way..

Or may be just on the payroll of certain corporations and happy to say anything their bosses suggest. Well, maybe that is pretty stupid, but a lot of generally non-stupid people seem to behave that way..