People have pointed out that Comey should have been fired on Jan 20th. Not sure that holds water.
But..... Andy McCabe, an obvious Democrat, has been  appointed, by Trump, in his place. 
Now, the facts, McCabe is a seasoned and skilled investigator, did Trump just shoot himself in the foot ?
Perhaps another regrettable decision by  a president who does NOT understand politics.  My guess,
the speculation that a Trump Impeachment is inevitable is growing.