John Podesta is a Smart Guy, but he was stupid enough to fall for a phishing attack
He wasn't just stupid, he was ignorant in an area vitally important to his job and the country. One of his passwords was "P@ssword" sent over plain text. Another of his passwords was "Runner123", crackable by a dictionary attack in seconds. He also used "Runner5678", also easily crackable. He obviously reused passwords, hence his twitter account was hacked after his apple ID password was leaked. He didn't have 2 step authentication switched on. He used open wifi hotspots on public transport, and as we all know he fell for that phishing scam. He very nearly became part of "President Hillary's" cabinet, possibly Secretary of State. I don't know what areas he's smart in but he sounds like an idiot to me.