Former Trump campaign chairman Paul Manafort has been found guilty of eight financial crime charges in a United States court in the first trial victory for special counsel Robert Mueller's team.

Key points: The jury deliberated for four days

The jury deliberated for four days The judge has not set a sentencing date

The judge has not set a sentencing date Prosecutors have until the 29th of August to decide whether to retry Manafort

A judge declared a mistrial on 10 other counts after jurors failed to reach a unanimous verdict.

The jury deliberated for four days before announcing the verdict at the federal courthouse in Alexandria, Virginia.

Prosecutors spent more than two weeks presenting their case as they sought to prove Manafort concealed millions of dollars in offshore accounts from the Internal Revenue Service.

Manafort was found guilty of two of nine bank fraud charges, one of four charges related to failing to disclose foreign bank accounts and all five tax fraud counts.

Counts of bank fraud carry a prison term of up to 30 years.

Manafort stood quietly while the verdict was being read by the clerk.

At the conclusion, the prosecutors hugged one another and then the prosecution and the defence shook hands.

Manafort's lawyer, Kevin Downing, told reporters afterward that his client was disappointed in the verdict and was evaluating his options.

The judge has not set a sentencing date, and has given prosecutors until the 29th of August to decide whether to retry Manafort on the deadlocked charges.

Trump warned not to attempt to pardon Manafort

The outcome also established the ability of special counsel Robert Mueller's team to persuade a jury of average citizens despite months of partisan attacks — including from Donald Trump — on the investigation's integrity.

Mark Warner, the senior Democrat on the US Senate Intelligence Committee, said in a statement that the Manafort verdict refuted Mr Trump's repeated charge that the Mueller investigation was a "witch hunt."

He warned that any attempt by Mr Trump to use his presidential powers to pardon Manafort or interfere in Mr Mueller's probe "would be a gross abuse of power and require immediate action by Congress."

The verdict raised immediate questions of whether the President would seek to pardon Manafort, the lone American charged by Mr Mueller to opt for trial instead of cooperating.

Commenting after the verdict, Mr Trump tried to distance himself from his former campaign chairman's conviction, saying it did not involve him.

"I feel very badly for Paul Manafort. It has nothing to do with me. Nothing to do with Russia collusion," Mr Trump said as he arrived in West Virginia for a rally on Tuesday night, local time.

The President spoke sympathetically throughout the trial of his onetime aide and at one point suggested that he had been treated worse than gangster Al Capone.

The trial captured Mr Trump's attention as he worked to undermine Mr Mueller's investigation through a constant Twitter barrage and increasingly antagonistic statements from his lawyer-spokesman, Rudy Giuliani.

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But Mr Trump and his campaign were only a small part of Manafort's trial as jurors instead heard days of testimony about Manafort's finances and what prosecutors say was a years-long tax-evasion and fraud scheme.

Manafort decided not to put on any witnesses or testify himself in the trial.

His attorneys said he made the decision because he did not believe the government had met its burden of proof.

Manafort's convictions came on the same day Mr Trump's former lawyer Michael Cohen has pleaded guilty to eight charges, including campaign finance fraud.

ABC/wires