Manafort was in charge of Trump's campaign when the NY real estate developer accepted the party's presidential nomination at the Republican National Convention in 2016.
President Trump denies any collusion with Russian Federation, and today tried to make the case publicly that collusion would not be a crime anyway.
Outside the courthouse, a handful of protesters displayed a life-sized puppet of Trump and held signs saying "Trump won't do time for you", "It's Mueller time", and "I like your new suit" alongside a photo of Manafort's mug shot.
Prosecutors are expected to argue that Manafort's lavish spending on suits, homes and luxury items did not match the income declared on his tax returns and that he misled lenders when he borrowed tens of millions of dollars against NY real estate.
Prosecutors also noted that they intend to present evidence highlighting a financial executive's interactions with Manafort.
The unsuccessful civil lawsuit sought, among other things, to prevent Mueller from bringing additional charges in the future, including potential charges relating to Manafort's work on the Trump campaign.
Manafort was initially ordered to remain under house arrest as he awaited trial, but U.S. District Court Judge Amy Berman Jackson, who is presiding over the case in the District of Columbia, sent him to jail in June after prosecutors flagged evidence that Manafort had been trying to influence the testimony of potential witnesses.
Manafort, 69, faces 18 counts in Virginia, including multiple counts each of filing false income tax returns, failing to report foreign bank accounts, bank fraud and bank fraud conspiracy.
American college student goes missing while swimming in Israel
Her body was found on Monday. "She was supposed to start on August 23", Thomas-Mora said before breaking down in tears. A University of Kentucky sophomore was missing in Israel after a late night swim in the Mediterranean Sea.
Security personnel from the Department of Homeland Security's Federal Protective Service, watch the vicinity around the Alexandria Federal Court in Alexandria, Virginia, on day one of Paul Manafort's trial.
Manafort's Virginia trial is expected to last around three weeks.
Prosecutors preparing witnesses for the upcoming trial of President Donald Trump's one-time campaign chairman Paul J. Manafort are advising them to avoid mentioning Trump's name, ABC News has learned.
Manafort's attorneys have indicated that they no longer plan on arguing about the legitimacy of Mueller's appointment.
As president, Trump has downplayed Manafort's role in the campaign.
But the trial will give the public its most detailed glimpse of evidence gathered by special prosecutor Robert Mueller. At one point, his defence lawyers sued Mueller and the Justice Department, saying they had overstepped their bounds by bringing a prosecution untethered to the core questions of Mueller's investigation - whether Russian Federation worked with the Trump campaign to tip the election.
As for Mueller's bank fraud allegations, Zehnle said that Manafort was "open" with the outside professionals who helped to facilitate loans, about why he was seeking the money and what he planned to spend it on.
In Zehnle's retelling it was Gates who was the point person for Manafort's book-keepers and tax preparers.
Mueller's team has indicted or secured guilty pleas from 32 people and three companies, including the indictment of 12 Russian intelligence officials.