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 dropped his civil suit challenging 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’s authority the day before his trial on bank and tax fraud charges began.

Manafort filed Monday to drop his appeal of a ruling that tossed out his civil suit against Mueller, challenging the scope of his investigation and claiming that it was overly broad.

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U.S. District Judge Amy Berman Jackson ruled earlier this year that the civil suit “is not the appropriate vehicle” for Manafort to raise issues with Mueller and that he “will have the opportunity to challenge any defect in the prosecution in the trial court or on direct appeal.”

The filing came one day before Manafort’s Virginia trial on bank and tax fraud charges began on Tuesday, the first criminal trial in Mueller’s probe of Russia's interference in the 2016 presidential election, including whether the Trump campaign colluded with Moscow.

Manafort had pleaded not guilty to the charges.

A Washington, D.C., appeals court on Tuesday also upheld a ruling that Manafort must remain in jail ahead of his September trial in D.C. A judge ordered Manafort to jail last month after Mueller alleged that the former Trump official had attempted witness tampering.

Manafort will face charges of obstructing justice, conspiracy to obstruct justice and failing to register as a foreign agent during his D.C. trial. He has also pleaded not guilty to those charges.