Special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE unveiled new evidence on Tuesday that former Trump campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE orchestrated an extensive campaign to lobby U.S. lawmakers and media on behalf of former Ukrainian President Viktor Yanukovych.

A pair of memos made public in a court filing detail Manafort's role in an effort to draw attention away from the prosecution and imprisonment of Yanukovych's political rival Yulia Tymoshenko.

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One memo, authored by Manafort and dated April 22, 2013, discusses an effort "to heavily engage with the [U.S. Government] and US Congress, using a strategy I built called 'Engage Ukraine' which focused the dialogue on positive key issues, and away from [Tymoshenko]."

It also details how Manafort "organized and leveraged the visits of" two members of the Hapsburg group — a group of former European leaders allegedly paid to lobby on behalf of Ukraine — "to make critical in-roads in how policymakers view Ukraine" in the United States.

Manafort also boasted in the memo about how he arranged to place op-eds in publications, including The Hill, and sought to pitch "our narrative and messaging to key reporters and editors at the Washington Post, the Wall Street Journal, and New York Times."

Manafort is facing charges in Mueller's probe into Russian meddling in the 2016 presidential election, including failing to register as a foreign agent with the Justice Department for lobbying work performed on behalf of Ukraine and Yanukovych.

That case is set to go to trial in September.

Prosecutors added new charges against Manafort last week accusing the former Trump campaign chairman of witness tampering in the case.