Comey's comment demonstrates an attitude that constitutes not only a threat against American citizens and their Constitutional Rights but also constitutes a domestic threat to the government of the United States.
Comey, the former Director of the FBI, expressed the belief that it is ok for the FBI to be above the law / Constitution and to engage in obvious illegal activity when acting in a manner THEY / IT deems justifiable.
Much like politicians, the FBI is supposed to SERVE the United States Govt / American people and have instead demonstrated they have elevated themselves to positions of un-checked power, their loyalty being to the FBI 1st and to their own bias / politics / political loyalties. Comey and the FBI leadership, in this case, chose sides, taking part in the Obama administration's protection of Hillary and the failed coup attempt against Trump.
SIDE NOTE:
It has never been a secret that the top government agencies - especially the CIA, FBI, and Intel Community - have grown its leaders from within the agencies and that their loyalty has always been to the Agencies 1st. They have always acted on behalf of the agencies and have acted to protect their own from sandal and punishment for their crimes.
Mueller was the former FBI Director, and as Director evidence shows he hid evidence of Russian crimes - to include intimidation, extortion, and bribery of politicians and nuclear agency employees - during the Uranium One Scandal. Evidence also shows Mueller was called before a Secret FISA Court to explain why HIS FBI illegally engaged in FISA Court Abuses at least 75 times. PROVING THAT MUELLER AND HIS FBI ENGAGED IN CRIMINAL FISA COURT ABUSES. (The fact that the US IG is now finding this criminal FBI activity continued under Comey, Mueller's protégé, shows Mueller never stopped that from happening at the FBI.
Comey, as mentioned, was Mueller's protégé, raised / groomed within the FBI to take over when Mueller left. Evidence shows, just like when Mueller was Director, the FBI continued to engage in illegal activity under Comey, and we also see the same criminal arrogance from another former FBI Director who is openly attempting to justify his and his FBI's criminal activity while attempting to defend / protect the FBI and its reputation.
Wray, the NEW FBI Director, has already demonstrated he is a carbon copy of Mueller and Comey by acting to defend the FBI and its exposed illegal spying rather than 'clean his house'. Wray actually publicly stated, like Comey, that secret illegal electronic surveillance of US citizens - and Presidential candidates and their team during elections obviously - without their knowing about it is 'NOT SPYING'.
The ONLY thing that can break this chain, IMO, is to finally appoint an FBI Director (and CIA Director) who has NOT been groomed from within the agency and whose loyalties lie with the agency 1st and political parties 2nd.