Judge Ellis, sitting in Alexandria, Virginia, just outside Washington, said he himself was being guarded by a USA marshal.
The trial against Manafort is not related to the activities he carried out from March-August 2016 as head of the Trump campaign, a post he was forced to resign after it emerged he had failed to declare $US12.7 million ($A17.4 million) he received from Yanukovich. A spokesman for the U.S. Marshals Service did not immediately comment.
Ellis did not disclose details about the threats he had received.
The jury also requested that the judge redefine "reasonable doubt". The jury requested to be dismissed at 5 p.m.so one of it's 12 members could attend a previously scheduled event.
Prosecutors say the 69-year-old dodged taxes on millions of dollars he made lobbying for Ukrainian politicians.
Westling said that is the reason the defense made a decision to rest Its case without calling any witnesses to testify, including Manafort himself.
But Mueller's team has proven to be quite taciturn, The New York Times reports, going so far as to withhold comment about their lunch orders.
The president said: "I think the whole Manafort trial is very sad".
A Manafort acquittal would provide ammunition to the president and his allies to ramp up the pressure on Mueller to conclude his investigation.
BUT the charges that Manafort faces are the direct result of the special counsel investigation, led by former FBI Director Robert Mueller, into Russian interference in the 2016 election and possible collusion.
He is then believed to have lied to banks to get loans when the money ran out - and is now facing 18 felony counts on tax evasion and bank fraud.
Prosecutors said Manafort had collected $65 million in foreign bank accounts from 2010 to 2014 and spent more than $15 million on luxury purchases in the same period, including high-end clothing, real estate, landscaping and other big-ticket items.
Listen to what else Vance had to say about Trump's "message" to Manafort in the video up top.
In his defense, Manafort's attorneys told jurors to question the entirety of the prosecution's case as they sought to tarnish the credibility of Manafort's longtime protege - and government witness - Rick Gates.
Chelsea beats Arsenal 3-2 for 2nd straight win in EPL
This is always the way, but it is clear that defensively we suffered three goals but also we had chances to do more goals. Mkhitaryan followed Aubameyang's example by somehow also blazing over an nearly identical chance from close range.
In as much as most movies show how gambling is bad or addictive, look on the brighter side, it is a good way of making money. With so many people shaming gambling, directors are trying to put it out there that it is not as bad as people make it seem.
Smart home security needs to be a priority reveals Mirai.
This is why they are able to potentially cause so much harm, and why they are such a possibly lucrative target for attacks. Manufacturers are also focussed on keeping costs down in order to attract consumers, and security is not cheap.