You should read the NY Times account of the firing of William Sessions by Clinton. No mention of Watergate at all in that story. Just listed the reasons that Clinton had to do it. And at the recommendation of the Attny General.
That situation is more similar to this one than Watergate is to this one.
Grassley is a straight arrow.
One of the very few senators who are.
And Bill Clinton Fired The FBI Director The Day Before Vince Foster Was Found Dead!
http://www.freerepublic.com/focus/f-bloggers/3551853/posts