Retired U.S. Army Lieutenant General Michael Flynn, who was rumored to have been considered a VP candidate for Donald Trump, caused an uproar over the weekend when he retweeted an anti-Semitic message that blamed the recent Wikileaks release of DNC emails on Jews.

“The corrupt Democratic machine will do and say anything to get #NeverHillary into power. This is a new low,” tweeted Flynn, who linked his message to another tweet: “>CNN implicated. ‘The USSR is to blame!’ … Not anymore, Jews. Not anymore.” Reported Politico:

Flynn was responding Sunday to an assertion by Robby Mook, Hillary Clinton’s campaign manager, on CNN that Russia was behind the hack and release of tens of thousands of internal Democratic National Committee emails last week.

That user’s tweet linked to a post from CNN Politics sharing the clip of Mook’s remarks.

Flynn deleted the tweet and called it a “mistake,” adding that he had intended to simply link to a CNN video that the original poster had included. The video shows Hillary Clinton’s campaign director Robby Mook floating the theory that Russian intelligence agencies had timed the leaks of the DNC emails in order to prop up their preferred candidate, Donald Trump.

Flynn, who is an adviser to Trump, spoke for the GOP candidate during the convention. Trump himself recently praised Flynn’s new book on Obama’s failures in Middle East policy.