President Donald Trump on Monday slammed Fox News after his once-favorite network released a new poll that shows him trailing against many of his potential 2020 Democratic rivals.

The poll shows Trump losing to former Vice President Joe Biden by 10 points and Sen. Bernie Sanders (I-Vt.) by 9. It also shows Sen. Elizabeth Warren (D-Mass.) Sen. Kamala Harris (D-Calif.) and South Bend Mayor Pete Buttigieg with very small leads over Trump.

“Something weird going on at Fox,” the president tweeted. “Our polls show us leading in all 17 Swing States.”

It’s not clear what internal polls he was referring to. However, Trump reportedly fired some of his own pollsters after leaked internal polls showed him trailing Biden in key states.

.@FoxNews Polls are always bad for me. They were against Crooked Hillary also. Something weird going on at Fox. Our polls show us leading in all 17 Swing States. For the record, I didn’t spend 30 hours with @abcnews, but rather a tiny fraction of that. More Fake News @BretBaier — Donald J. Trump (@realDonaldTrump) June 17, 2019

Last month, Trump slammed Fox News for even covering the Democrats, and was especially annoyed at the network’s town hall event featuring Buttigieg.

9 PHOTOS Fox News contributor salaries revealed See Gallery Fox News contributor salaries revealed John Bolton

National Security Advisor Fox News job: Ex-contributor

Salary: $569,243 Heather Nauert

Ex-Spokesperson, Bureau of Public Affairs (State) Fox News job: Ex-anchor

Salary: $485,000 Scott Brown

Ambassador, New Zealand and Samoa Fox News job: Ex-contributor

Salary: $175,000 Anthony Scaramucci

Ex-White House Communications Director Fox News job: Ex-contributor

Salary: $88,461 Richard Grenell

Ambassador, Germany Fox News job: Ex-contributor

Salary: $80,000 Tony Sayegh

Assistant Secretary for Public Affairs (Treasury) Fox News job: Ex-contributor

Salary: $72,851 K.T. McFarland

Ex-Deputy National Security Adviser Fox News job: Ex-contributor

Salary: $63,518 Sebastian Gorka

Ex-White House Strategic Initiatives Group Fox News job: Ex-strategist

Salary: $4,321 (one month) Georgette Mosbacher

Ambassador, Poland Fox News job: Ex-contributor

Salary: $31,336 Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

“Fox is moving more and more to the losing (wrong) side in covering the Dems,” he wrote.

Trump still seems to favor Sean Hannity, a network host who not only supports the president but has taken the stage with him at a rally.

The president didn’t mention Hannity by name, but in the evening cited the network for something that appeared on his show:

Wow! The State Department said it has identified 30 Security Incidents involving current or former employees and their handling of Crooked Hillary Clinton’s Emails. @FoxNews This is really big. Never admitted before. Highly Classified Material. Will the Dems investigate this? — Donald J. Trump (@realDonaldTrump) June 18, 2019

This article originally appeared on HuffPost.

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