Still, Republican voters tended to be overwhelmingly supportive of the president. Fox News condemned these actions, issuing a brief statement on November 6. "We have an extraordinary team of journalists helming our coverage tonight and we are extremely proud of their work", the statement read.
A spokeswoman for Fox News did not immediately return a request for comment.
Mr Hannity even tweeted: "To be clear, I will not be on stage campaigning with the president".
Hannity said he had no idea he would be would be speaking, although the Trump campaign had said Saturday he would be a "special guest".
"He met me at the plane when I arrived, spoke at the great Rally, & stayed to the very end", he wrote. "Something I have done in every election in the past".
The problem was not so much that Hannity was part of the rally, doing his opening monologue in the hall filled with thousands awaiting the arrival of Trump. He recited a list of Trump's achievements after calling his fellow media "fake news" and sparking a backlash from Trump arch-nemesis CNN. He referred to the other reporters as "fake news". Among those expected were Trump's adult children, White House aides, Republican officials and presidential friends. It went on and on with claims of Trump's greatness flying so fast and furious they could never be fact checked in real time. "I want to just thank everybody for the way you behaved".
"What I said in my tweet yesterday was 100% truthful", Hannity tweeted. "This was NOT planned". "They do unbelievable work day in and day out in a fair and balanced way and it is an honor to work with such great professionals", he posted.
"Can you imagine Don Lemon campaigning for Stacey Abrams?"
"You left nothing on the field, eleven stops in eleven cities".
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.
It is unusual for journalists and on-air commentators to participate in campaign rallies.
That talking point was repeated regularly throughout the rest of the night on Fox News - accepted and repeated mainly because Trump said it.
Hannity was rebuked by Fox in 2010 when the Tea Party advertised he would be appearing at one of its rallies.
Still, about one-third of voters said Trump was not a factor in their votes.
It wasn't clear what exactly the woman was treated for, but she was described in news reports as "elderly". Another Fox News host, Jeanine Pirro, also appeared onstage with the president. But in an interview with The New York Times a year ago, he said he was a journalist, more specifically an advocacy or opinion journalist. It was a group that included his own Fox News colleagues. The opinionated host defended the move on Twitter as unplanned.