Hilliary Clinton now regrets not "going after" Jim Comey because she feels that his investigation broke precedent by revealing her illegal unsecured server at a time when she was standing for election. Funny, my take on the whole deal is that Comey broke precedent by not prosecuting someone who had clearly mishandled classified information.
To draw a picture, I had the privilege of working at TRW-Space Park (now part of Northrup Grumman) in 1994 and 1995, not that long after the company had been embarrassed by the real-life espionage portrayed in The Falcon and the Snowman. Suffice it to say that even 17 years after Christopher Boyce was convicted of espionage, the company was very sensitive to the possibility that it would happen again, and when I hired in, they made it very clear that if they saw any sign of mishandling of classified information--even being found in the locked areas where the classified work was done--it would be a race between HR and the FBI to see who could take action first. When I would go out to lunch with coworkers, someone would always make a point of putting his badge where it could not be seen, because it was well known that KGB agents could and would try to work with TRW employees to get information.
So my response to Hilliary is "yes, Comey violated precedent by not getting a warrant for your server, and by not indicting you." And it's a shame that we do have a pattern whereby prominent politicians who mishandle classified information get a "pass" from prosecutors that ordinary people who work with it do not.