Here is disgraced right-wing gadfly Milo Yiannopoulos on the alt-right that Bannon bragged about supporting:

http://www.breitbart.com/tech/2016/03/29/an-establishment-conservatives-guide-to-the-alt-right/

I didn't even finish reading the piece at your first link; it was sheer fluff.

The Politico article is primarily concerned with the rhetoric of Democratic Party leaders toward Bannon, not whether Bannon is a white nationalist. Mercifully Bannon's star is falling, but it is mind-boggling he was ever installed at the White House, much less the NSC! Incriminating evidence against Bannon was there for all to see BEFORE the election. La la la la la.