Thousands of Russian Twitter accounts turned their misinformation focus to supporters of Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.) in 2016 after he lost the Democratic Primary to Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE.

A study by Clemson University researchers reported by The Washington Post found that thousands of tweets from Russian-owned accounts masquerading as conservative accounts supporting President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE began targeting Sanders's supporters shortly after the primary concluded.

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“#BlackMenForBernie Leader Switches to Trump! I will Never Vote for Hillary, Welcome aboard the Trump Train,” read one tweet sent by a Russian account pretending to be a "Southern., Conservative Pro God, Anti Racism" Twitter user from Texas.

“Conscious Bernie Sanders supporters already moving towards the best candidate Trump! #Feel the Bern #Vote Trump 2016,” read another account known as "Red Louisiana News" that was actually operated by Russians.

It's not clear how successful or effective the efforts were.

About 12 percent of Sanders voters said they ended up voting for Trump over Clinton in the general election, according to the Post. That was smaller than the 24 percent of Clinton supporters who said they voted for Sen. John McCain John Sidney McCainThe Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' Cindy McCain: Trump allegedly calling war dead 'losers' was 'pretty much' last straw before Biden endorsement MORE (R-Ariz.) in his 2008 bid for the White House against the eventual winner, President Obama.

Still, the number of Sanders voters who supported Trump in Michigan, Wisconsin and Pennsylvania — states considered key to Trump's victory — was higher than Trump's margin of victory in those states.

“I think there is no question that Sanders was central to their strategy,” Darren Linvill, one of the two Clemson researchers behind the study, told the Post. “He was clearly used as a mechanism to decrease voter turnout for Hillary Clinton.”

A spokesman for Clinton said that it was imperative that Democrats work together in 2020 to stop Russian disinformation efforts aiding the president and to defeat Trump.

It's important for “everyone else, especially Democratic candidates, to work together and support each other to defend against these threats," Nick Merrill told the Post.

The Hill has reached out to the Sanders campaign for comment.