Comey needed to get his ass up outta there.. You don't bend the law to your will just cause you are head of the FBI.
Hillary Clinton clearly broke the law, but he let her go cause he felt there was no "Intent".. like Intent is relevant, did she break the fucking law or not? which he admitted yes she did. every thing he did during the investigation was clearly a political one. The irony of all of it though is that Hillary is most likely going to be in deep shit now cause who ever gets appointed will probably really put the Pressure on her now.
Also it's kinda funny how a lot of people on the left are saying that Comey shouldn't have been fired yet during the Hillary investigation, they were calling for his resignation.. though honestly, there is two theories as to why comey was fired.
There is definitely a link between Trump and the Russians and trumo didn't want Comey getting into it, or the second theory is that he fired Comey for incompetence.. which I'm confident the second theory is the reason for his firing.