Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.) lashed out at Russia on Saturday in the wake of reports that the CIA concluded the Kremlin worked to help Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE get elected.

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“Don't have to be Sherlock Holmes to figure out what Russia is up to -- they're trying to undermine democracies all over the world,” Graham wrote on Twitter.

“Russia is trying to break the backs of democracies – and democratic movements – all over the world,” the Republican lawmaker added.

Don't have to be Sherlock Holmes to figure out what Russia is up to -- they're trying to undermine democracies all over the world. — Lindsey Graham (@LindseyGrahamSC) December 10, 2016

Russia is trying to break the backs of democracies – and democratic movements – all over the world. — Lindsey Graham (@LindseyGrahamSC) December 10, 2016

Graham said this week that he plans to pursue a congressional investigation into alleged Russian meddling in the election.

The issue moved into the spotlight late Friday when The Washington Post reported that the CIA had concluded Russian hackers intervened in the election to help Trump win.

Graham noted Saturday that he believes the election results are legitimate, despite his concern about "Russian interference."

I'm not challenging the outcome of the election, but very concerned about Russian interference/actions at home & throughout the world. — Lindsey Graham (@LindseyGrahamSC) December 10, 2016

Trump has continued to deny that Russia was involved in the election and has defended Russian President Vladimir Putin.

On Friday, his transition team rejected the CIA's assessment about Russia's interference on behalf of Trump.

“These are the same people that said Saddam Hussein had weapons of mass destruction,” the transition team said in a terse statement.