Hannity used the campaign theme of "Promises Made" and "Promises Kept" as a rhetorical hammer in his monologue underscoring Trump accomplishments and linking himself totally to the campaign.
Hannity, who tweeted earlier on Monday that he wouldn't be campaigning with Trump, praised him onstage and criticized other journalists as "fake news".
Trump's campaign had billed Hannity as a "special guest" at the rally, but Fox had said that wasn't so, insisting he was merely broadcasting his show from the arena.
"By the way, all those people in the back are fake news", Hannity said, referencing the pen for the press pool that also included Fox News journalists.
Hannity, in his response to the criticism on Twitter, also failed to acknowledge the fact that he could have also taken the stage and delivered a series of non-partisan remarks. Some, like Hannity, Pirro and Fox Business Network host Lou Dobbs, reportedly even act as unofficial advisers to Trump at times.
Fox News would not comment on how the situation was 'addressed, ' or provide any information about Hannity's actions beyond its initial public comment.
He gave Trump a free lane to say how "thousands and thousands" of people had turned out at his rallies Monday and had to be turned away because halls couldn't hold them.More news: NBC, Fox News Pulling Trump's Anti-Caravan Ad
One Fox News employee described to CNN Business the scene at the NY headquarters of Fox News at the time, as a number of journalists inside the company's news division watched the episode unfold live.
"They know, vaguely, that they're not supposed to have one of their hosts endorse a candidate or a party", CNN anchor Alisyn Camerota said.
National Security Adviser John Bolton, State Department spokeswoman Heather Nauert, National Economic Council Director Larry Kudlow, and current White House Communications Director Bill Shine all had careers at Fox News before joining the administration. "They do fantastic work day in and day out in a fair and balanced way and It is an honor to work with such great professionals".
Fox called it an "unfortunate distraction" that has been addressed.
Hannity has for years flouted the usual standards required of Fox News employees.
The latest incident wasnt the first time Fox News has had to chide Hannity for his closeness to the president.
It was an extraordinary scene after the news network had worked Monday to establish distance between Hannity and the campaign. "Doctor? Please. Thank you", Trump said, pointing toward a portion of the crowd in Show Me Center in Cape Girardeau.
Press secretary Sarah Huckabee Sanders said Trump would spend the day making telephone calls, monitoring congressional and gubernatorial races and meeting with his political team.