First off the Steele dossier is NOT what started the FBI investigation into Trump’s ties with Russia, that was Carter Page bragging about Russian contacts with an Australian diplomat.

That is also a lie as reported by the WaPo:

The senator was not made aware of the Steele dossier until Nov. 18, 2016 — after Trump had won the election. And there is no evidence that McCain gave the dossier to the media.

Former McCain aide David Kramer, a Russia expert, testified in a deposition in the BuzzFeed libel case in Florida that he gave the dossier to the media in December 2016. McCain himself gave the dossier to the FBI, but there is no evidence that he gave it to the media.

This is actually the second day in a row that Trump has gone after John McCain.

He tweeted this out yesterday:

The man is dead. 

Why can Trump never let anything go? 

And where the fuck is John McCain’s best friend, Lindsey Graham in all of this?

How do you stay silent when somebody is lying about and disrespecting the memory of the man that you claimed to have loved so much?

This was the best he could come up with to defend his friend.

Jesus, is that really the best the famously acid-tongued Senator can come up with?