Bannon is like a Trump with brains.
I think he is just trying to save himself. It is highly unlikely Breitbart has not received financial and strategic aid (telling them what stories to run and so on, perhaps even sending them fully written stories) when he was at their head.
I think there is a lot for Mueller to look at, and that there being such a miasma of shenanigans surrounding all of Trump's behavior and dealings is the reason why he is taking so much time. Mueller is reputed to be very thorough.
If Trump didn't have something to hide, he wouldn't be trying to discredit the investigation by undermining Mueller and the FBI. Bannon is just one of the problems Trump has, a very serious problem. Trump is desperately trying to discredit Wolff's book, trying to keep it from being published, and trying to stiffle Bannon. He must be very, very afraid.
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