director, the author of "the threat: how the fbi protects america in the age of terror and trump." andrew, good evening. >> good evening. >> how seriously is the department of homeland security treating these threats, and what will they be looking for? >> well, don, i think what we're seeing here is the department of homeland security is now thinking about and treating threats from domestic extremists in the same way that we have thought about and handled threats from foreign terrorists, foreign extremists over the last decade or so. and that is, i think, a very positive development. we know that the department of homeland security and the fbi both believe that the threat from domestic, right-wing, white supremacist extremists ask the most serious terror threat that we face in this country today. so they are thinking about it along the same lines.