“I’m not a scientist” is what Republicans use as an excuse to be stupid about science they don’t like for political reasons only, and this ad ridiculing them is absolutely perfect. You must watch.

Of course, the only time they use that excuse is to deny climate change or evolution. When it comes to abortion and the question of when life begins, not one of them ever refuses to take a position there, claiming they are “not a scientist.”

Cudos to the Clinton campaign for this ad.