The New Republic explains how Guiliani is just plain nuts:

‘Rudy Giuliani asserts “truth isn’t truth.”The former mayor of New York, who is now the most public face of the President’s legal team, was interviewed by NBC’s Chuck Todd on Meet the Press on Sunday.

It did not go well, especially when Giuliani spoke about the notorious Trump Tower meeting of June 9th, 2016 between a group of Russians, led by Natalia Veselnitskaya, and top members of the Trump campaign, including Donald Trump Jr., Jared Kushner, and Paul Manafort. Giuliani flatly asserted, Veselnitskaya “didn’t represent the Russian government. She’s a private citizen. I don’t even know if they knew she was Russian at the time. All they had was her name.”

In point of fact, in a June 3, 2016 email that helped set up the meeting, the pop music promoter Rob Goldstone informed Donald Trump Jr. that the document that were going to be discussed at the meeting were “part of Russia and its government’s support for Mr. Trump.”