I think Rosenstein more or less panicked when he found himself in the middle of the dispute of whether his memo to Trump was the reason Trump decided to fire Comey, or whether Trump made the decision before Rosenstein wrote the memo.
It almost seemed he hired a SC to take the heat off himself, which only lasted for a couple of days. He definitely looks like a bad hire as DAG.
As I understand it, Rosenstein has a reputation of being some even player guy on Capital Hill. You could be right that he couldn't take any pressure so he even things out in his mind by appointing Mueller.
“I think Rosenstein more or less panicked when he found himself in the middle of the dispute of whether his memo to Trump”
I don’t believe that. Unfortunately, this country doesn’t have the luxury of time for this kind of keystone cop, ‘step on your own d!ck’ kind of activity at the DOJ.
Here he is back in May when Comey just got fired.
"Trump Backs Deputy AG on No Special Prosecutor for Russia Probe"
http://www.newsmax.com/Politics/trump-rod-rosenstein-russia-probe/2017/05/12/id/789910/
So what turned Rosenstein? I see Senator Warner DU pressuring Rosenstein that the Dems would not confirm any FBI Director that Trump appointed. Warner wanted him to appoint an SC. He may have gotten much more pressure.