In case we forgot, Donald Trump reminded us Thursday that he’s not exactly a big Politico fan. On SiriusXM’s “Breitbart News Daily,” the Republican presidential candidate called the political news site “one of the most dishonest organizations I’ve ever dealt with.”

“It is not true what they write, generally,” Trump told radio host Steve Bannon. “I mean, they write some true stuff. … I can only tell you as pertains to Trump. I have had more false and dishonest articles from Politico than, I think, anybody else. And that’s saying something -- to the point where we don’t deal with them anymore.”

What irked him this time was an article by Kenneth P. Vogel and Ben Schreckinger that reported Trump previously (and quietly) courted mega-donors Sheldon Adelson, Paul Singer and the Koch brothers — conservative backers from whom Trump has publicly distanced himself, boasting that his personal wealth makes him unbeholden to outside interests, such as them. Trump told Bannon the report is untrue.

The business mogul has made a habit of trolling Politico on Twitter in recent months — with Politico and some of its writers trolling him right back, in some cases.

Some highlights:

When and why did this start? Asked about the origin of the beef, neither the Trump campaign nor a spokeswoman for Politico responded.

But a trip in the Twitter time machine suggests that Trump’s disdain for Politico dates to 2012 — Oct. 24, 2012, to be specific.

That was the day, shortly before the last presidential election, when Trump posted an online video in which he offered to donate $5 million to a charity of President Obama’s choosing, in exchange for Obama’s college records and passport application.

The proposed deal dealt with an extension of Trump's "birther" push, coming 18 months after Obama released his long-form birth certificate in response to persistent questions (largely, or at least most vocally, from Trump) about his eligibility for office.

In the days before Trump posted the video, he had promoted “something very, very big concerning the president of the United States.”

Before the video went live, however, Politico set it up to be a snoozer: “Just hours away from Donald Trump’s hyped ‘game changing’ announcement on Wednesday and many politicos have already made up their minds,” began one story. “Their verdict? Zzzzzzzzzz …”

And once the video was posted, Politico depicted something less-than-thrilling. This was the lede on an article bearing the headline, “Trump mocked on Twitter”:

Tweets spanning the political spectrum skewered Donald Trump Wednesday after his much-publicized announcement about President Barack Obama — which he billed as a bombshell — turned out to be a bust.

Trump’s response was swift and suggested his opinion of Politico had suddenly changed.

Indeed, just a few months earlier, Trump had used his Twitter account to plug a Politico interview in which he discussed being named the Sarasota Republican Party’s “Statesman of the Year.”

Here's the thing about Trump's media feuds, though: They never last.

Remember when he said he wouldn't appear on Fox News anymore?

He was back on "The O'Reilly Factor" a week later.

In June, NBC said it was ending its business relationship with Trump, following what the network considered "derogatory statements ... regarding immigrants." That meant yanking the Miss USA and Miss Universe pageants off the air. More recently, Trump complained about "rude" questions during last week's CNBC debate and has threatened to boycott a future debate sponsored by Telemundo, which is part of the NBCUniversal family.

Yet Trump will host NBC's "Saturday Night Live" this weekend and told Bannon — during the same interview in which he blasted Politico — that "I have a very good relationship with NBC."

Come to think of it, Trump has already shown he can't stay mad at Politico, either.

It's almost as if, when it comes to media outlets, Trump is a bit fickle.