When it comes to childish put-downs directed at journalists, Donald Trump is a king among men. (And that's saying something: Scroll through our Twitter replies for some very interesting commentary.)

Witness the Real Donald Trump's latest Twitter rant, directed at conservative pundit and author Charles Krauthammer.

Ouch.

So what did the vile Krauthammer do to deserve such vitriol from a real-estate mogul, a TV show host and incredibly serious presidential candidate?

On "Special Report with Bret Baier" on Fox News on Thursday, Krauthammer noted that Trump is leading a poll of presidential candidates that GOP primary voters would not vote for.

Trump has "a deserved 59 percent," Krauthammer said.

Host Bret Baier interrupted, asking, "Do you have to add 'deserved'?" Why yes, he did. Krauthammer added: "He is going to say how sad it is that I’m saying these things. But, you know, this is an open forum, and we have free speech. He has a well-deserved and, I would say, an impressive 59 percent.”

Game on.

Trump is actually kind of famous (infamous?) for his Twitter attacks on journalists who dare to, you know, point out how ridiculous the things he says are. Here are a few more, plus what prompted them:

Case 1

The offending incident: In April, Weekly Standard writer Stephen Hayes said Trump's 2016 run is "a clown show."

Trump unleashes:

Case 2

The offending incident: Also in April, National Review columnist and Fox commentator Jonah Goldberg went on Baier's show. That appears to be it. (Though in January, he did say, “I think Donald Trump is a bane of humanity.")

Trump unleashes:

Case 3

The offending incident: Goldberg decided to respond to Trump on Twitter (Pro tip: Never a good idea).

He also wrote a column in National Review, saying that Trump tweets "like a 14-year-old girl."

Trump unleashes: 

Case 4

The offending incident: In 2013, Michelle Malkin, the conservative pundit and founder of the Twitter aggregation site Twitchy, called Trump "a conservafraud."

Trump unleashes:

Case 4

The offending incident: In 2012, conservative Washington Post columnist George Will questioned why then-GOP nominee Mitt Romney was associating with Trump. Will called Trump "a bloviating ignoramus." Uh-oh.

Trump unleashes:

Case 5

The offending incident: It's not all conservatives on the receiving end of Donald Trump's Twitter hate. Recently, The Fix's own Chris Cillizza has called Trump "irrelevant" and "Republicans' worst nightmare."

Trump unleashes:

Case 6

We'll end on a positive note of Trump's relationship with the news media. One fine day in April (a lot of these tweets happened within the span of a few days), MSNBC's liberal commentator Ed Schultz actually defended Trump. Trump, Schultz said, seems like someone "willing to work with the other side" and has an "unparalleled" business record in the GOP field.

Trump unleashes: Well, yes, Trump can work with the other side -- when they compliment him.

We'll let Trump philosophize about what all of this means.

The end. (But hopefully not of Trump's Twitter hate. That will keep us amused forever.)