chairman, rick gates, are indicted on charges of conspiracy, and money laundering. gates later pleaded guilty to two counts, and became a cooperating witness in the investigation. manafort was tried. convicted. and sentenced to a total of seven and a half years in prison. trouble for trump reached his most inner circle. >> donald trump, as the next president of the united states of america. >> december 2017, former national security adviser michael flynn pleads guilty to lying to the fbi regarding his conversations with kisliak. flynn also agrees to cooperate with the mueller probe. >> i feel badly for general flynn. i feel very badly. he's led a very strong life. and i feel very badly. >> february, 2018. mueller indicts 13 russian nationals, and three russian companies for interfering with the election through social media. april, 2018, things took a