Here are more points & links about Barr and how the right invented its "unitary executive" (misnomer) theory.
1. It strikes me as the ploy of a politician worried about his own criminal jeopardy...
Each day we learn how open & explicit (& loud) Trump was about this extortion scheme.
It's implausible that Barr wasn't aware of Trump withholding arms.
If he knew, he is a criminal co-conspirator.
Seems like threats and extortion.
"Well, she's [Amb. Yovanovitch] going to go through some things. I will have Mr. Giuliani give you a call and I am also going to have Attorney General Barr call and we will get to the bottom of it."
I'd be very nervous.
Barr's best defense is to politicize the case.
Make it partisan.
And wrap himself in the base.