Donald Trump says he will no longer appear on Fox News for the time being, after an apperance on the O'Reilly Factor was canceled and a parade of guests critical of him continued to appear on Fox News.

".@FoxNews has been treating me very unfairly & I have therefore decided that I won't be doing any more Fox shows for the foreseeable future," Trump tweeted at mid-day on Wednesday.

Trump also called out Bill O'Reilly on Twitter this week for having "the same old Trump haters" as guests and "refusing to ... post the great polls that came out today including NBC."

Fox News clearly has been on Jeb Bush's side since the campaign began.  Karl Rove is a nearly constant presence on many Fox shows, and he has been beating the drum for Bush since the campaign began.  A parade of other Bushies like Dana Perino have appeared as "analysts" who have also pushed for Bush.

At first, when the campaign began, this bias showed up in a lot of press favorable to Bush, and other candidates, while not openly attacked, were simply ignored and given little air time.

When Trump entered the race and started leading, the dynamics changed.  Instead of ignoring Trump, Fox News started attacking him.  Megyn Kelly asked Trump hostile questions but did not pose similarly tough questions to Jeb Bush.  Similarly on Fox News, you can see guest after guest criticizing Trump for being "divisive," but very few guests appearing to comment on Jeb Bush's support for amnesty for illegal aliens.

It is perfectly legitimate for a news network to have guests criticizing a politician, but it becomes excessive when it is skewed so that most of the guests criticize one candidate and/or praise another.  That is what is happening at Fox.  They are in the Bush camp, as Mark Levin has frequently observed.

In the past, candidates like Ted Cruz took it quietly, not wanting to risk what little exposure they had on Fox.

But Trump is different.  He realizes he gets big ratings wherever he goes, so he has the power to get his message out on any network he likes.  He can afford to ignore Fox.  However, Fox needs him to get ratings.  That's why, during their last dispute, Fox called Trump to make up with him.

Given their need for ratings, and given Trump's lack of need for Fox, you can expect the same thing to happen again soon.

It's refreshing to see Fox called on its bias.  The only thing that's disappointing is that no other candidate has done the same.

Before Trump got into the race, Ted Cruz was considered brash and divisive; now, by comparison, he's considered as quiet as a mouse.  It's concerning, because right now Trump is the only leading candidate who even rhetorically is tough on illegal immigration.

This article was written by Ed Straker, senior writer of NewsMachete.com, the conservative news site.