Steve Bannon says Donald Trump made the biggest mistake in 'modern political history' by firing FBI Director James Comey
Former White House chief strategist Steve Bannon says the firing of FBI Director James Comey may have been the biggest mistake in 'modern political history'

Bannon confirmed he opposed President Donald Trump's decision to oust Comey, calling the FBI 'an institution'
Ousted White House adviser also said that if Comey hadn't been fired, 'We would not have the Mueller investigation,' referring to special counsel Robert Mueller
Bannon also took aim Sunday at current and former Republican leaders, including former President George W. Bush and his administration
He called Republican national security officials who had served in the George W. Bush administration 'idiots'