Donald Trump’s former campaign manager Paul Manafort has had his bail revoked by a Washington DC judge.
Robert Mueller, who is investigating alleged Russian election interference, accused Mr Manafort of trying to tamper with potential witnesses before the trial.
Mr Manafort was accused of contacting people related to his case in breach of his bail terms.
The judge ordered him to be held in jail before his trial.
The judge said Mr Manafort had “abused the trust placed in you” and treated the court proceedings as “just another marketing exercise”.
Mr Manafort’s trial on charges of money laundering and illegal lobbying is due to begin in September.
He is accused by prosecutors of laundering more than $18m (£13m).
Paul Manafort jailed by judge for alleged witness tampering