These notes appear to have angered Trump, but also allowed Mueller to conclude that McGahn was a credible witness “with no motive to lie or exaggerate given the position he held in the White House.”

Trump on Friday also tweeted that the investigation was “an Illegally Started Hoax that never should have happened” but he left the sentence unfinished in a tweet and had not followed up hours later.

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The angry tweetstorm was a contrast to Trump’s reaction Thursday, where he said he was “having a good day” and repeating his mantra of “no collusion, no obstruction.” However, he added that he intended to “get to the bottom of these things,” hinting at calls for the origins of the two-year investigation to be reviewed.

“This should never happen to another president again, this hoax, it should never happen to another president again,” he said.

The Associated Press contributed to this report.