This came after Hannity insisted that he would interview the president back stage and hold a live show from the venue, but wouldn't actually get on stage to campaign on the president's behalf.
Mr Hannity even tweeted: "To be clear, I will not be on stage campaigning with the president". "This was NOT planned".
And he said that he was not referring to any Fox colleagues when he pointed out the "fake news" reporters standing in the press area.
While Trump was in Missouri to stump for Senate candidate Josh Hawley, the rally was largely about him.
Alex Henderson is a news writer at AlterNet and veteran political journalist. Hannity himself had tweeted: "To be clear, I will not be on stage campaigning with the president". In 2010, he was ordered not to broadcast his program as part of a Tea Party rally originating from Cincinnati.
Since then, Fox opinion personalities have doubled down on their support of Trump.
The network had tried earlier on Monday to establish distance between Hannity and Trump's campaign, which had billed Hannity as a "special guest" at the rally.
"I want to thank everybody for the way you behaved, that was beautiful" said the president, "hopefully she'll be ok". In the past, Hannity has said that he's a talk show host, not a journalist. "I'm aghast as are a number of other people".
Initially, Hannity and the network said that Hannity would simply air his show from the rally venue in Cape Girardeau, Missouri, and follow that with an interview with Trump.
Trump called Rep. Nancy Pelosi and noted her pitch for bipartisanship in her remarks, her office tweeted.
"They say we're divisive, but we're not divisive, we're defending an America that has strayed from its founding", he said. Hannity hugged Trump and, after lobbing his crowd-pleasing insult at the media, recited economic statistics. Jeanine Pirro also campaigned with the president, shouting to the crowd, "Do you like the fact that [Trump] is the tip of the spear who goes out there every day and fights for us?"
Their speeches weren't televised on Fox News, but were seen on C-SPAN. A Fox spokeswoman said she didn't know how that impression had been created.
"Fox's admitted lack of control is only reinforced by the absence of sanction here", Carusone said.
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