Anderson Cooper on Tuesday poked fun at President Trump’s habit of watching CNN despite his distaste for the network, joking that the president must be one of his most frequent viewers.

"It’s on in his offices at Trump Tower. … He watches me on CNN more than my mom watches me on CNN," Cooper told Seth Meyers on NBC’s “Late Night.”

Trump has taken to frequently referring to CNN as "fake news,” a characterization Cooper found "inappropriate."

"Our job is to ask tough questions of all sides and to be fair,” explained Cooper, the network's highest-paid and highest-rated host.

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“But I do think it’s inappropriate for the president of the United States to be referring to CNN as ‘fake news.’ ”

The "Anderson Cooper 360" host also said Trump should be doing other things at night besides watching cable news.

“There’s gotta be something more important going on for the president to be doing than flicking around the shows,” he said.

The last time Trump appeared on CNN was in August for an interview with Cooper.