Comey knows that the FBI is ill-suited to get to the bottom of their investigation of Trump’s Russia connections because their handling of Sater would be exposed. If backed into corner Comey will have no other choice then to tell everyone a "mole" has been next to Trump for years. Soon the news will comes out that Trump's entire empire is based on laundered money from Russia. This is why you see Trump doing all he can to help Russia in every way. From ending the embargo against them to giving them back their New York property ceased by the FBI under the order of Obama. Watch the short 1:35 second video below and ask yourself, does he act like a man that is innocent?

BBC Panorama 2017 Trump, Felix Sater - YouTube

Washington Monthly | Trump, Felix Sater, and the FBI