At last month's Republican National Convention, President Donald Trump declared, “Your vote will decide whether we protect law-abiding Americans, or whether we give free rein to violent anarchists and agitators, and criminals who threaten our citizens.” The man behind this rhetoric is Stephen Miller, a powerful Trump advisor. The 35 year-old anti-immigration crusader and white nationalist has been the moving force behind Trump’s immigration policy and the author of his darkest speeches.

Miller has conjured apocalyptic visions of immigrants as a threat to America and has targeted refugees, asylum seekers, and migrant children. So who is Stephen Miller? Jean Guerrero, an Emmy-winning investigative reporter formerly with the Wall Street Journal, explores the influence of Miller and white nationalism in the Trump administration in her new book, Hatemonger: Stephen Miller, Donald Trump, and the White Nationalist Agenda.