Buchanan: Is Flynn's Defection A Death Blow?

Authord by Patrick Buchanan via Buchanan.org,
Why did Gen. Mike Flynn lie to the FBI about his December 2016 conversations with Russian Ambassador Sergey Kislyak? Why did he not tell the FBI the truth?
As national security adviser to the president-elect, Flynn had called the ambassador.
Message: Tell President Putin not to overreact to President Obama’s expulsion of 35 Russian diplomats. Trump will be president in three weeks, and we are committed to a new relationship.