As questions about his relationship with Russia continue to swirl, President Donald Trump spent his Sunday night lashing out at perceived enemies, taunting Washington Post owner — and Amazon.com Inc. AMZN, -2.26% chief executive — Jeff Bezos over his divorce and mocking Sen. Elizabeth Warren’s Native American heritage.

“So sorry to hear the news about Jeff Bozo being taken down by a competitor whose reporting, I understand, is far more accurate than the reporting in his lobbyist newspaper, the Amazon Washington Post,” Trump tweeted.

A little background: On Saturday, the Post reported that Trump has gone to extraordinary lengths to conceal notes and transcripts of his one-on-one meetings with Russian President Vladimir Putin. The Post noted that withholding details of those potentially important meetings was prevented “even high-ranking officials in his own administration from fully knowing what he has told one of the United States’ main adversaries.” (Separately, the New York Times reported Friday that the FBI opened an investigation into whether Trump was working for Russia after he fired FBI Director James Comey in 2017. In an telephone interview with Fox News on Saturday, Trump was asked if he has ever worked for Russia, but dodged answering the question.)

Meanwhile, Bezos and his wife, MacKenzie, who have been separated for months, announced their divorce last week ahead of a series of National Enquirer exposés, which included text messages and photos documenting his relationship with another woman.

The Enquirer has long been friendly to Trump, offering “catch-and-kill” deals to kill potentially embarrassing stories about Trump, and the Enquirer and David Pecker, chairman of Enquirer publisher American Media Inc., were implicated in the Michael Cohen case. In December, the Manhattan U.S. attorney’s office said it would not prosecute American Media for suppressing a story from a former Playboy model who claimed to have a years-long affair with Trump, in exchange for cooperation with the investigation.

Last week, some had speculated that the Enquirer targeted Bezos because of Trump’s animosity toward him. Sources with ties to the Enquirer said Bezos was targeted “because he’s the world’s richest man and a newsworthy subject,” according to CNN.

About 20 minutes after his attack on Bezos, Trump lashed out at Warren, D-Mass., a vocal critic of the president, mocking an Instagram video she did and again calling her by a derisive nickname.

“If Elizabeth Warren, often referred to by me as Pocahontas did this commercial from Bighorn or Wounded Knee instead of her kitchen, with her husband dressed in full Indian garb, it would have been a smash!”

Trump deleted his original post, but posted an identical one soon after.

While apparently stewing at the White House, Trump was also facing no easy way to resolve the 23-day-old government shutdown, which a majority of Americans blame him and the GOP for, according to new polls released Sunday.