a) Comey did not press forward with criminal charges against Hillary Clinton after performing an investigation, while she was Trump's opponent.
b) Comey continued with a current pending investigation against Trump and the Trump administration regarding Putin's involvement in the election, and subsequently into the multiple Trump people who have been found to have acted as unannounced, unconfirmed foreign agents while still illegally serving in national security and cleared roles. Further, Comey refused to drop the investigation even though Trump reminded Comey that he was, in fact, Trump.
c) Comey has been fired.
There is no way to spin this, to talk around it, or to make it seem coincidental or hyperbolic. This as egregious an abuse of power as I can imagine, and worse is simply symptomatic of the mindset of this man who truly believes that he was elected to be not president, but king.