"Traditionally late night has been light and breezy, with a minimum of political posturing," the Fox News host said at the end of his program Monday. He characterized CBS's decision to tap Colbert as the next host of "Late Night" "interesting," then sniped that "Colbert has made an entire career on pleasing the left."
"So he has to compete with Fallon and Kimmel, who are basically high-energy guys who like to have a good time on their shows," he continued. "It'd be hard to fathom that 40 percent of Americans that describe themselves as conservative will watch Colbert."
But O'Reilly, who feuded with Colbert over the past few weeks about efforts to reduce income inequality, seemed to give his rival the benefit of the doubt.
"But Colbert will have good writers and surely he knows his challenge," he concluded.
Mediaite has video of the segment.