https://arstechnica.com/tech-policy/2018/12/giuliani-cant-figure-out-how-urls-work-blames-twitter-for-liberal-bias/

Rudy Giuliani, who briefly advised Donald Trump on cybersecurity before taking a role as his personal attorney, doesn't understand how domain names work. And that lack of understanding led him to invent a ludicrous conspiracy theory about Twitter.

It all started when Giuliani tweeted about special counsel Robert Mueller: