And recently an expert in medicine and epidemiology. In fact, Trump has a learning disability. He can't read and won't listen.

TRUMP SAYS HE KNOWS MORE THAN ANYBODY ABOUT ISIS, DRONES, SOCIAL MEDIA, CAMPAIGN FINANCE, TECHNOLOGY, POLLS, COURTS, LAWSUITS, POLITICIANS, TRADE, RENEWABLE ENERGY, INFRASTRUCTURE, CONSTRUCTION, ENVIRONMENTAL IMPACT STATEMENTS, NUCLEAR WEAPONS, BANKS, TAX LAWS, INCOME, MONEY, AND THE ECONOMY. TRUMP DOESN'T KNOW JACK. AND DON'T BE A FOOL FOR BELIEVING HIM.