Washington Post senior editor Marc Fisher said Sunday that President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE has “a jealousy issue” with Amazon CEO Jeff Bezos.

In an interview on CNN's "Reliable Sources," Fisher responded to Trump’s attacks on The Washington Post, which Bezos owns, and on Amazon.

Trump has lashed out at Amazon in recent days, and has referred to the Washington Post as a “chief lobbyist” for the company, a claim Fisher called “absurd.”

“It’s an absurd claim. The Washington Post has done really a lot of critical reporting of Amazon,” Fisher said. “What’s really going on here is that the president, according to some people inside the White House, has kind of a jealousy issue with Jeff Bezos.”

Fisher pointed specifically to the recent publication of the Forbes list of richest people in the world, on which Trump came in at No. 766 and Bezos topped the list.

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“He’s had a long-standing obsession with that Forbes list and doesn’t like where he is on it,” Fisher said. He also added that Trump doesn't "quite get" the rise of online retailers like Amazon.

Though Trump has repeatedly criticized The Washington Post as part of his attacks on the media as “fake news,” he has upped his criticism in recent weeks in conjunction with criticism of Amazon.

He hit the paper on Sunday in a tweet responding to the recent Post report that chief of staff John Kelly John Francis KellyMORE has lost influence in the White House.

“The Washington Post is far more fiction than fact. Story after story is made up garbage - more like a poorly written novel than good reporting,” he tweeted. “Always quoting sources (not names), many of which don’t exist. Story on John Kelly isn’t true, just another hit job!”

The Washington Post is far more fiction than fact. Story after story is made up garbage - more like a poorly written novel than good reporting. Always quoting sources (not names), many of which don’t exist. Story on John Kelly isn’t true, just another hit job! — Donald J. Trump (@realDonaldTrump) April 8, 2018

New York Times Executive Editor Dean Baquet also commented on Trump’s rhetoric Sunday, saying that his attacks on the media are “out of control.”