This September Manchester University Press published a volume of essays, Global White Nationalism: From Apartheid to Trump which I edited along with Camilla Schofield and Jennie Sutton. 

The book emerged from a collaborative project motivated by the desire to explain the connected triumphs of Trump and the Brexit referendum.  It reveals that far from provincial holdovers from a distant past, white nationalists throughout the English-speaking world have been adaptable and formed connections across the globe.

You can read an excerpt from the book introduction at the Boston Review.

I have written short pieces for the Washington Post and Irish Times  (twice) based on my research for this book.