White supremacists most persistent extremist threat to U.S. politics: Homeland Security head

U.S. Senate Homeland Security and Governmental Affairs Committee conducts hearing on nomination of Chad Wolf to be secretary of Department of Homeland Security (DHS) on Capitol Hill

WASHINGTON (Reuters) - Acting Homeland Security Secretary Chad Wolf told a congressional hearing on Wednesday that white supremacists are the most persistent extremist threat in U.S. politics, but in Portland, Oregon the local federal courthouse was specifically targeted by protesters who had "this anarchist sort of ideology."

(Reporting by Mark Hosenball and Lisa Lambert)