Neal Katyal, who served as acting U.S. Solicitor General under former President Obama from 2010 to 2011, called President TrumpDonald John TrumpFacebook releases audit on conservative bias claims Harry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Recessions happen when presidents overlook key problems MORE’s retweet of a conspiracy theory tying former President Clinton to the death of alleged sex trafficker Jeffrey Epstein “unfathomable.”

“It is unfathomable to me that a President of the United States would retweet this. Literally unfathomable,” Katyal tweeted Saturday evening.

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“It would be outrageous for even a member of a local city council, let alone from the person who is to Take Care that the Laws be Faithfully Executed,” he added.

The tweet in question cited no evidence. Clinton’s name appears several times on flight logs for Epstein’s private jet, while Epstein and Trump were known to move in the same circles in New York and Florida and Trump told New York Magazine that Epstein was a “terrific guy” in 2002 but later fell out with the financier.

Counselor to the president Kellyanne ConwayKellyanne Elizabeth ConwayThe Hill's Morning Report - Trump searches for backstops amid recession worries Florida first lady to miss Women for Trump event due to planned execution Trump adopts familiar mantra on possible recession: fake news MORE defended Trump’s retweet on “Fox News Sunday,” saying “I think the president just wants everything to be investigated.”

Several 2020 Democratic candidates blasted Trump for spreading the conspiracy theory Sunday morning, including Sen. Cory BookerCory Anthony BookerCastro qualifies for next Democratic primary debates Eight Democratic presidential hopefuls to appear in CNN climate town hall Biden, Buttigieg bypassing Democratic delegate meeting: report MORE (D-N.J.) and former Rep. Beto O’Rourke (D-Texas), as did CNN’s Jake TapperJacob (Jake) Paul TapperButtigieg says voting for Trump is 'at best' looking the other way on racism White House trade adviser says Chinese tariffs are not hurting US Former acting solicitor general: 'Literally unfathomable' that Trump would retweet conspiracy theory about Epstein death MORE, who said Trump could "use his megaphone for anything” but “often uses it to amplify that which is the worst of us: personal attacks, bigotry and insane conspiracy theories.”