President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE on Sunday renewed his attacks against Fox News over its recent polls, saying that the network favored by conservatives is "only getting worse."

Trump made the attack while contrasting surveys from Fox News and Rasmussen Reports on his approval rating. Rasmussen's daily tracking poll on Friday showed the president with a 50 percent approval rating among likely U.S. voters. Just 43 percent of voters said they approved of Trump's job performance in a Fox survey released earlier this month.

Rasmussen at 50%. @MediaBuzzFNC & @FoxNews are only getting worse! Now @donnabrazile & others on Fox. Not what it used to be! https://t.co/Uo51Yn5PTX — Donald J. Trump (@realDonaldTrump) August 25, 2019

"Rasmussen at 50%," Trump said on Twitter, before arguing that Fox News and its Sunday show "Media Buzz" were "only getting worse!"

He then cited the network's decision to hire former Democratic National Committee Chairwoman Donna Brazile Donna Lease BrazileEx-Pence aide: Trump spent 45 minutes of task force meeting 'going off on Tucker Carlson' instead of talking coronavirus How Biden decided on Harris Trump tweets 'we all miss' Ailes after swiping at Fox MORE as a contributor as an example of it not being what it "used to be."

"So @donnabrazile gives Crooked Hillary the Questions, and now she’s on @FoxNews," he added in a separate tweet, referring to a controversy involving debate questions she sent Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE during the 2016 Democratic presidential primary.

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Brazile in response told Trump to focus on his job.

"Try to bring out the best in others and repent when you make mistakes. Seek forgiveness & strive for excellence," she added.

Mr President, you represent over 320 million ppl. Focus on your job! Try to bring out the best in others and repent when you make mistakes. Seek forgiveness & strive for excellence.



I am rejoicing today here in New Orleans celebrating #KathleenBlanco’s life and legacy. #BeBest https://t.co/MigL765WtJ — Donna Brazile (@donnabrazile) August 25, 2019

Trump has frequently railed against the media during his two-plus years in the White House, often referring to members of the press as "enemies of the people" and fake news. But until recently he's mainly reserved praise for Fox News and its hosts.

He's repeatedly lashed out at the network over its polling over the past two months. He knocked the network last week after a survey showed him losing to former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE, Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D-Calif.), Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) and Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) in hypothetical 2020 match-ups.

"I don't know what's happening with Fox," he told reporters, adding that he doesn't "believe" the polls.

"Fox is different. There’s no question about it," he continued.

The remarks prompted a rebuke from Fox News anchor Bret Baier, who said that the network had not "changed."

Howard Kurtz, the host of "Media Buzz," backed up Baier's assessment on Sunday, saying that the survey about 2020 match-ups was "very much in line" with other recent polls.

He later defended the fairness of the network and his Sunday show in a tweet.

"Trump just tweeted that @MediaBuzzFNC is getting worse, apparently because I defended a Fox 2020 poll," he said. "I happen to think we make every effort to be fair to a POTUS much maligned by the media."

The survey comparing 2020 Democrats to Trump was released the same week that his disapproval rating surged to a near record in a poll conducted by Fox, with 56 percent of respondents saying they disapproved of Trump's job performance.

The survey found a 5 percentage point increase in Trump's disapproval from last month.

The Hill has requested comment from Fox News on Trump's latest comments.

This report was updated at 1:34 p.m.