DOJ is the political brain and nerve center of government. It should be obvious to everyone now - its political warfare, using the law. The President needs a true loyalist and ally. Joe Kennedy Sr. insisted JFK appoint his brother. Reagan had long-term friend Ed Meese. Obama had true fellow travelers (he even made sure they were black) Holder and Lynch. They lied, covered-up, and plotted for obama - they pushed Obama's radical agenda.
I don't know how Trump missed this obvious fact.
That is the sixty four thousand dollar question. The man who wrote "Art of the Deal" also missed Bill Clinton and his AG, Janet Reno, who gave us Waco, Ruby Ridge, and federal troops pointing a gun at Elian Gonzalez?
Trump's knowledge gap regarding the historical importance of having an absolute loyalist heading DOJ is--as you have inferred--inexplicable.
Yeah, in retrospect it’s hard to understand, but we have to remember, Sessions appeared to be the most Trump-friendly person in Washington throughout the entire campaign, and he was manifestly qualified and widely respected. But yes, I think Giuliani was the next choice, and that probably would’ve been better.