A federal judge has sent President Trump's former campaign manager, Paul Manafort, to jail ahead of his trial in September, citing recently filed charges that Manafort tried to tamper with two witnesses. The judge also revoked his bail.

The backdrop: Federal prosecutors working for Special Counsel Robert Mueller accused Manafort of attempting to tamper with witness testimony by contacting them through encrypted text messages. Meanwhile, Manafort, who faces charges including failing to register as a foreign agent, money laundering, tax evasion, and conspiracy, has pleaded not guilty in both D.C. and Virginia.