The ceremony occurred in the Blue Room of the White House, where many senior law enforcement officials — including the Secret Service director — had gathered. Mr. Comey — who is 6 feet 8 inches tall and was wearing a dark blue suit that day – told Mr. Wittes that he tried to blend in with the blue curtains in the back of the room, in the hopes that Mr. Trump would not spot him and call him out.

“He thought he had gotten through and not been noticed or singled out and that he was going to get away without an individual interaction,” Mr. Wittes said Mr. Comey told him.

But Mr. Trump spotted Mr. Comey and called him out.

“Oh and there’s Jim,” Mr. Trump said. “He’s become more famous than me.”
With an abashed look on his face, Mr. Comey walked up to Mr. Trump.

“Comey said that as he was walking across the room he was determined that there wasn’t going to be a hug,” Mr. Wittes said. “It was bad enough there was going to be a handshake. And Comey has long arms so Comey said he pre-emptively reached out for a handshake and grabbed the president’s hand. But Trump pulled him into an embrace and Comey didn’t reciprocate. If you look at the video, it’s one person shaking hands and another hugging.”