Sean Hannity crossed a line by appearing on stage at a rally with President Trump

The New York Times

"By taking part in the rally, Mr. Hannity was crossing the line that had traditionally separated those in the news media — even opinion hosts like him — from the people they are supposed to cover," says Jim Rutenberg, adding: "On Monday night....with its biggest star joining Mr. Trump at a raucous campaign event, Fox News entered new territory — a thicket in which it’s hard to tell where the network ends and the president begins. The morning after, Fox News employees were complaining about what had happened in Cape Girardeau."