Trump fires Comey

[Black Aeronaut]

At the time, it was no big surprise that Clinton fired Sessions.  This from the article you linked, khagler:

This wasn’t a matter of mere partisanship.  William Sessions was an awful FBI Director.  According to the New York Times’ account of the matter, the Director loved the trappings and pomp of his high office, but took little interest in the actual job of running the FBI, leaving the critically important agency leaderless and adrift just as the mission was shifting, from counterintelligence against the newly fallen USSR, to defending against the specter of domestic and international terrorism.  The FBI was devolving into warring internal factions.  

Undercurrents of unrest surfaced last year when several complaints led to an internal inquiry by the Office of Professional Responsibility, an internal watchdog unit of the Justice Department. 
The report found that Mr. Sessions had taken numerous free trips aboard F.B.I. aircraft to visits friends and relatives, often taking along his wife, Alice. The report, which was endorsed officially by Attorney General William P. Barr on his last day in office, detailed a litany of abuses. It is a lacerating portrayal of the Director as an official who was in charge of enforcing the law but who seemed blase about perceptions of his own conduct.

Having been, thus, excoriated by the outgoing Republican Administration of George H. W. Bush, Bill Clinton’s incoming Democratic Administration surprised no one in its ardor to see the last of Mr. Sessions.  But the stubborn Republican FBI Director refused to go voluntarily, finally provoking Bill Clinton to telephone Mr. Sessions on July 20, 1993.  The President called twice.  The first call was to tell the Director he was fired.  The second was to tell the Director it was effective immediately.

So yeah.  Clinton had legitimate reasons for it.  Making it sound like Trump is doing it just because Clinton did it and so it's okay....  yeah.