Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Former Trump Campaign Chair Goes on Trial by Masood Farivar ALEXANDRIA, VIRGINIA -- The tax and bank fraud trial of former Trump campaign chairman Paul Manafort got underway on Tuesday with the formal process of jury selection in the closely watched case Several dozen potential jurors were called into an Alexandria, Virginia, federal courtroom by the presiding judge in the case, T.S. Ellis III. The trial, the only one to arise from Special Counsel Robert Mueller's investigation into Russian interference in the 2016 U.S. election, is widely seen as a test of the probe's heft and credibility. Manafort has pleaded not guilty to the charges. On the surface, the criminal charges against Manafort -- tax evasion, failure to report foreign bank accounts and fraudulently obtaining bank loans -- are unrelated to the core of Mueller's investigation into whether the Trump campaign colluded with Russia to subvert the 2016 U.S. national election. The charges stem from Manafort's decade-long lobbying and political consulting work for Ukraine's former president, Viktor Yanukovych. While working for Yanukovych and his pro-Russia Party of Regions between 2006 and 2015, Manafort and his former business partner, Rick Gates, allegedly earned tens of millions of dollars in fees while hiding the income from the Internal Revenue Service. To avoid paying hefty taxes, prosecutors say, they set up secret shell companies and offshore accounts to funnel their Ukrainian proceeds disguised as "loans" to U.S. accounts to buy multimillion dollar properties and luxury goods. After Yanukovych was deposed in 2014 and their Ukrainian income dwindled, Manafort and Gates allegedly came up with another scheme to obtain money: the two used their real estate properties in the United States as collateral to fraudulently secure more than $20 million in bank loans by "falsely inflating" their income. In all, prosecutors say, more than $75 million flowed through the offshore accounts Manafort and Gates set up. Manafort has been in jail since June, when the judge presiding over the Washington case revoked his bail for allegedly tampering with potential witnesses. The special counsel has enlisted as many as 35 witnesses to testify against Manafort. They include accountants, financial advisers, tax preparers and real estate agents. But prosecutors' star witness is likely to be Gates, who worked closely with Manafort in Ukraine and later followed him into Trump's campaign as deputy chairman. Gates was named as a co-defendant in the initial indictment handed down against Manafort last October. But when the special counsel hit the two men with a second indictment in February, Gates pleaded guilty to two lesser counts in exchange for cooperation. Manafort has remained defiant, vowing to fight the charges.