Mayorkas says White supremacists pose ‘most prominent threat’ to US homeland White supremacists pose the biggest terror threat to the United States, Homeland Security Secretary Alejandro Mayorkas said Friday amid a surge of illegal border crossings. The Department of Homeland Security has assessed that “the greatest terrorism-related threat that we face in the homeland is the threat of domestic violent extremism,” Mayorkas said. Citing an “increase in hate” that’s spread on social media and other online platforms, Mayorkas further specified that “the most prominent threat is the threat of White supremacists.” Mayorkas made the remarks during a speech at Al...