"I see it as a very, very serious and outrageous move on the part of Mr. Trump, once again, trampling on the statutory authorities of the Director of National Intelligence and the heads of the independent intelligence agencies," Brennan told MSNBC host Chris Hayes. "And it's unclear to me what Mr. Barr is actually going to do. Is he investigating a crime? Well, what's the predication of that crime? Or he is just going to be looking for information.