Fallacy of equivocation. Trump's claim was that "the Russia-Trump collusion story is a total hoax." Story cites no evidence of collusion.
This is strange: I typed in a thread following up on the above tweet but somehow failed to post it. Let's start again.
The quote "the Russia-Trump collusion story is a total hoax" was in the Post story when I initially tweeted about it. That was what Trump called a "hoax," not broader claims of Russian meddling.
The Post realized this was a problem. It deleted the quote from the story and appended this cryptic note. washingtonpost.com/politics/trump… 
There is now no reference in the story to Trump's calling anything a "hoax," but the headline still uses that word in quotes. 
The lede makes the same assertion, albeit without quote marks. 
If you look at Trump's tweets, you find lots of tweets in which he says "collusion" is a hoax, as in the one the Post quoted then deleted.
You can also find tweets with vague references like "the Russia hoax."
The redacted Post story quotes another such tweet, referring to "Russia talk." 
But if Trump has ever said, as the story claims, that "Russian interference was a hoax," the Post was unable to find any evidence. Indeed it quotes several instances in which he acknowledged interference.
This is sloppy and dishonest journalism on the Post's part. End of rant.
Courtesy of @Bioreducer, here is a screenshot of the deleted part of that Post story. 
