The message appeared on the chyron after Trump continued to push the lie that the 2020 presidential election had been stolen from him.
Trump said the election had been "rigged" against him and there's "so much evidence" pointing to this.
"It's a disgrace to our nation, and we are truly being scorned and disrespected all over the world," Trump said.
The disclaimer, which ran for nearly 40 seconds, read: "The voting system companies have denied the various allegations made by President Trump and his counsel regarding the 2020 election."
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Fox News did not immediately respond to Insider's request for comment.
The disclaimer appeared as Fox News is being sued by two voting-technology companies, Dominion Voting and Smartmatic, who alleged that the network amplified Trump's false election claims.
Trump has continued to insist that he is the real winner of the 2020 presidential election, without giving any evidence supporting that theory.
Even his own attorney general, Bill Barr, confirmed that there was no evidence of widespread election fraud.
Fox News has denied the accusations in both of the voting companies' lawsuits.
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"Fox News Media is proud of our 2020 election coverage, which stands in the highest tradition of American journalism, and we will vigorously defend against this baseless lawsuit in court," a statement from the company said, in response to the Dominion lawsuit in March.
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