The US Democratic National Committee says it will not allow Fox News to host any of its candidates' political debates through 2020, citing a report about the conservative channel's ties to US President Donald Trump.
"Recent reporting in the New Yorker on the inappropriate relationship between President Trump, his administration and Fox News has led me to conclude that the network is not in a position to host a fair and neutral debate for our candidates," DNC Chairman Tom Perez said in a statement.
"Therefore, Fox News will not serve as a media partner for the 2020 Democratic primary debates," Perez said.
Representatives for Fox said they hoped the DNC would reconsider and let some of its journalists moderate a Democratic presidential debate.
President Trump responded to the announcement by saying he may refuse to participate in certain debates.
"I think I'll do the same thing with the Fake News Networks and the Radical Left Democrats in the General Election debates!" he said in a Twitter post.
Mr Trump has criticised CNN and MSNBC, among other media, as "Fake News" for their coverage of his administration.
The DNC's decision is a rerun of the 2016 primary election, when it turned down Fox's multiple offers to host a debate, citing the network's longstanding conservative bent and prominent criticism of Democratic policies.
At that time a Democrat, Barack Obama, occupied the Oval Office.
Donald Trump, a Republican seeking re-election in 2020, has stoked polarisation between the two U.S. political parties by appealing to his base on Twitter and television and policy speeches while simultaneously publicly attacking and feuding with prominent Democrats.
US President Donald Trump acknowledges the crowd Source: AAP
The New Yorker earlier this week reported on "seamlessly" close ties between the President and the television network founded by Rupert Murdoch, citing an expert on presidential studies who said Fox is the "closest we've come to having state tv".
The article went on to describe the access and interviews that members of the White House have granted exclusively to the network.
As the field of competition to become Democrats' next presidential nominee grows ever more crowded, the party has decided to split its first primary debate over two weeknights this summer.
Twelve people have already jumped into the race and the DNC has capped each debate night at 20 candidates.
