‘but I assure you that Trump would not be president without Bannon’s nationalism’
Trump was championing nationalism while Bannon was still hyping Cruz. Both Bannon and his cheerleaders have a wildly exaggerated view of his influence. If he had the ability to help Trump nationally, then winning with Moore in a ruby red state should have been child’s play.
Bannon is ineffective at best. Trump, with God’s help, is responsible for Trump’s win.
Bannon and Breitbart did do a good job rounding up the zero hedge and fringe crowd vote for Trump. It helped Trump win places like Wisconsin. It remains to be seen how enthusiastic those folks will be in 2020 for POTUS.