Russia is interfering in the Democratic primary to help Sen. Bernie Sanders’ presidential campaign, according to the Washington Post. Us officials reportedly told the Sanders camp about a month ago.

There are few details about what substantive actions Russia took to advance Sanders’ campaign. The White House and lawmakers on Capitol Hill have also been briefed on Russia’s latest interference efforts.

Sanders criticized the Russian government and any efforts at election interference.’I stand firmly against their efforts, and any other foreign power that wants to interfere in our election,’ Sanders said.

Russian troll campaigns used social media platforms like Facebook and Twitter to hurt Hillary Clinton’s candidacy and back Sanders. It’s a partial replay of the 2016 primary.

Sanders was asked to disown online harassers that claim to support his candidacy on the Internet. He suggested that the harassment campaigns could be led by Russian operatives, not just his real supporters.

‘we remember efforts by Russians and others to try to interfere in our elections and divide us up,’ Sanders said earlier this week.’I’m not saying that’s happening, but it would not shock me,’ he said.

Us intelligence officials have also notified lawmakers that the foreign country is also working to advance Donald Trump’s reelection. Trump cursed acting intelligence director Joseph Maguire for allowing the briefing, apparently seeing it as giving Democrats a political advantage.