Bannon To Turn State's Evidence?

He's looking at a long sentence and if you are paying attention, Bannon fell out of favor with Trump. Do you recall why/when?. This is from the Guardian:

"Bannon even earned the black spot of a derogatory nickname from the president, “Sloppy Steve”, following the publication of book that quoted Bannon suggesting that Donald Trump Jr’s meeting with a Russian lawyer during the election campaign was potentially “treasonous”.

weird, huh?