Former National Security Adviser Mike Flynn arrives for a status hearing related to his guilty plea on charges that he made false statements in Special Counsel Robert Mueller's Russia investigation, at U.S. District Court in Washington, U.S., July 10, 2018. REUTERS/Joshua Roberts 

A supporter of former National Security Adviser Michael Flynn holds up placards as Flynn arrives for a status hearing related to his guilty plea on charges that he made false statements in Special Counsel Robert Mueller's Russia investigation at U.S. District Court in Washington, U.S., July 10, 2018. REUTERS/Joshua Roberts 

A supporter of former National Security Adviser Michael Flynn holds up placards as Flynn arrives for a status hearing related to his guilty plea on charges that he made false statements in Special Counsel Robert Mueller's Russia investigation at U.S. District Court in Washington, U.S., July 10, 2018. REUTERS/Joshua Roberts 

Former National Security Adviser Mike Flynn enters U.S. District Court as he arrives for a status hearing related to his guilty plea on charges that he made false statements in Special Counsel Robert Mueller's Russia investigation in Washington, U.S., July 10, 2018. REUTERS/Joshua Roberts 

Former National Security Adviser Mike Flynn enters U.S. District Court as he arrives for a status hearing related to his guilty plea on charges that he made false statements in Special Counsel Robert Mueller's Russia investigation in Washington, U.S., July 10, 2018. REUTERS/Joshua Roberts 

Former National Security Adviser Mike Flynn arrives for a status hearing related to his guilty plea on charges that he made false statements in Special Counsel Robert Mueller's Russia investigation, at U.S. District Court in Washington, U.S., July 10, 2018. REUTERS/Joshua Roberts 

Former National Security Adviser Mike Flynn arrives for a status hearing related to his guilty plea on charges that he made false statements in Special Counsel Robert Mueller's Russia investigation, at U.S. District Court in Washington, U.S., July 10, 2018. REUTERS/Joshua Roberts 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court after pleading guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs after a plea hearing at U.S. District Court, in Washington, U.S., December 1, 2017. REUTERS/Joshua Roberts 

A protester shouts after Former U.S. National Security Adviser Michael Flynn left after a plea hearing at U.S. District Court, in Washington, U.S., December 1, 2017. REUTERS/Joshua Roberts 

Former U.S. National Security Adviser Michael Flynn departs after a plea hearing at U.S. District Court, in Washington, U.S., December 1, 2017. REUTERS/Joshua Roberts 

Former U.S. National Security Adviser Michael Flynn departs after a plea hearing at U.S. District Court, in Washington, U.S., December 1, 2017. REUTERS/Joshua Roberts 

Former U.S. National Security Adviser Michael Flynn departs after a plea hearing at U.S. District Court, in Washington, U.S., December 1, 2017. REUTERS/Joshua Roberts 

Former U.S. National Security Adviser Michael Flynn departs after a plea hearing at U.S. District Court, in Washington, U.S., December 1, 2017. REUTERS/Joshua Roberts 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY 

Former U.S. National Security Adviser Michael Flynn departs U.S. District Court, where he was expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn is escorted into a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. TPX IMAGES OF THE DAY 

Former U.S. National Security Adviser Michael Flynn (L) arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn (L) arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn is escorted into a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. 

Former U.S. National Security Adviser Michael Flynn (L) arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. 

Former U.S. National Security Adviser Michael Flynn arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst 

Former U.S. National Security Adviser Michael Flynn arrives for a plea hearing at U.S. District Court, where he’s expected to plead guilty to lying to the FBI about his contacts with Russia's ambassador to the United States, in Washington, U.S., December 1, 2017. REUTERS/Jonathan Ernst