Fox News correspondent Geraldo Rivera on Friday lashed out at former FBI Director James Comey over his media tour, characterizing Comey's personal attacks on President Trump as "revenge of the nerd."

"He is everywhere speaking to everybody," Rivera said of Comey's tour promoting his book, "A Higher Loyalty: Truth, Lies, and Leadership."

"He has a No. 1 book out there, but the more exposure he gets, even among people naturally friendly toward his point of view, the less his image of grandeur is just shrinking," Rivera told "Fox & Friends," a show the president frequently watches and has praised numerous times on Twitter.

"He is melting right before our very eyes," Rivera continued in his attack on Comey. "Now he seems like - that 'awe, shucks' thing is gone. Now it seems like revenge of the nerd."

"He is bending over backwards to insult the president of the United States," he added later. "Talking about Donald Trump's little hands. His tie is too long. Orange face at all of these press events [Comey] is doing.

"In terms of the book and the memos, it seems like such a big nothing burger," the long-time journalist and television host concluded. "I don't see anything there that corroborates in any way the cosmic charge of collusion."

Comey's media tour to promote his bestseller has included stops on ABC's "20/20" and "The View," CBS's "Late Show," NBC's "Today," and CNN's "The Lead," among numerous other television and radio appearances.

Comey also appeared at a town hall hosted by The New Yorker on Thursday night, where he told editor David Remnick that he doesn't "crave to be known" while stating Trump has a hunger for affirmation.

Comey's media blitz will continue through next week.

The 57-year-old New Jersey native is also slated to sit down with Fox News anchor Bret Baier on Thursday and on PBS's Judy Woodruff on April 30.

Comey will join CNN for a town hall event at his alma mater, the University of William & Mary. It will be moderated by Anderson Cooper on Wednesday.

A Sunday night interview with ABC News's George Stephanopoulos was Comey's first interview since being fired by Trump last May. The special attracted 9.8 million viewers.