He has promoted the quack idea that vaccines cause autism, and has masterfully deployed the suggestio falsi – for example, his insinuation that climate change is a Chinese hoax designed to cripple the American economy.
Lors de la primaire du Parti républicain, il a laissé entendre que le père d’un de ses rivaux, le sénateur Ted Cruz, était impliqué dans l’assassinat de John F. Kennedy.