President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Friday tweeted that his former campaign manager 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 had received a "very unfair" sentence, even though no formal conviction was handed down.

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"What a tough sentence for Paul Manafort, who has represented Ronald Reagan, Bob Dole and many other top political people and campaigns," Trump tweeted. "Didn’t know Manafort was the head of the Mob. What about Comey and Crooked Hillary and all of the others? Very unfair!"

Wow, what a tough sentence for Paul Manafort, who has represented Ronald Reagan, Bob Dole and many other top political people and campaigns. Didn’t know Manafort was the head of the Mob. What about Comey and Crooked Hillary and all of the others? Very unfair! — Donald J. Trump (@realDonaldTrump) June 15, 2018

Trump's comments came shortly after Manafort was sent to jail following Judge Amy Berman Jackson's decision to revoke his house arrest.

Trump and his associates had made efforts to distance themselves from Manafort over the past year, with the president insisting on Friday that he had only worked on the campaign “for a very short period of time.” Manafort served as Trump's campaign manager for 144 days, The Washington Post reported.

Manafort's appearance in court Friday came after 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 investigative team argued that he had sought to tamper with witnesses.

The judge said she could not come up with a release order that would prevent Manafort from seeking to further influence the testimonies of other witnesses.

It is unclear where Manafort will be held or when he will be taken to jail.

Manafort's arraignment Friday morning came after Mueller's team hit him with a superseding indictment late last week, accusing him of obstruction of justice and conspiracy to obstruct justice.

Prosecutors had asked the district judge to narrow restrictions on Manafort or send him to jail following allegations that he attempted to sway two potential witnesses to lie to investigators about lobbying work for former Ukrainian President Viktor Yanukovych.

The witnesses, revealed in a court filing to be Alan Friedman and Eckart Sager, told Mueller of Manafort's attempts to influence them, The New York Times reported. The two men had worked for Hapsburg group — a group, Mueller described, that was made up of former senior European politicians who Manafort allegedly paid to lobby on behalf of Ukraine.

A court filing this week revealed two memos containing evidence that proved Manafort worked to lobby U.S. lawmakers on Yanukovych's behalf.

The ex-campaign manager previously faced a raft of charges including tax evasion, bank fraud, money laundering and failing to register as a foreign agent with the Justice Department for his work on behalf of Yanukovych and the Ukrainian government.

Prosecutors sought to send Manafort to jail, citing concerns that he could continue engaging in alleged criminal activity if he were to remain on house arrest.

Manafort has pleaded not guilty to all charges.

--Updated at 2:15 p.m.