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 once said that his work on Ukrainian politician Viktor Yanukovych’s presidential campaign in 2010 was the “most satisfying” in his career, according to court documents released by his defense team on Thursday.

The Washington Post reported that Manafort’s lawyers released hundreds of documents that they are requesting jurors be blocked from viewing ahead of his trial, set to start next week.

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“It is readily apparent that the Special Counsel intends to offer evidence concerning matters that are irrelevant to this tax and bank fraud trial,” Manafort’s lawyers wrote in a court filing on Thursday, according to the newspaper.

The released documents include those on Manafort’s political work in Ukraine, dating back to 2005.

“Having worked campaigns for the last 35 years, this one will be at the top of the list of most satisfying,” Manafort wrote in a note to a group of political strategists after Yanukovych won the 2010 presidential election in Ukraine.

Manafort’s team also released a 2013 memo discussing how a group of former European politicians, known as the Hapsburg group, will work to promote Ukraine, the Post reported.

“The Hapsburg team will also do a series of events ... to also influence key members of the US government through private meetings held at the highest levels,” the memo reads.

Manafort will go to trial next week on bank and tax fraud charges. 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 has charged Manafort in a separate trial with failing to register as a foreign agent.