President Donald Trump's former campaign chairman Paul Manafort pleaded not guilty Monday to charges of conspiracy and money laundering after the Justice Department unveiled the first indictments in the probe into Russian election interference.

Manafort, 68, and business partner Rick Gates, 45, both entered not guilty pleas in a Washington court after being read charges that they hid millions of dollars they earned working for former Ukrainian politician Viktor Yanukovych and his pro-Moscow political party.