Which is why Trump let him go.
In my reading of 2017, Bannon was let go to appease Mitch McConnell and get the tax bill passed.
You’ll recall that Bannon was backing people McConnell didn’t want.
I guess the peace pipe was smoked and Trump call Bannon’s dogs off and told him: “Get out of the country. Help us in Europe, but your time in the US is finished”
This is my theory.