The greatest domestic terrorism threats facing the United States in 2021 come from racially motivated or antigovernment violent extremists, a senior FBI counterterrorism official told Congressional committees looking into the Jan. 6 Capitol breach on Wednesday. “Looking forward, the FBI assesses there is an elevated threat of violence from domestic violent extremists, and some of these actors have been emboldened in the aftermath of the breach of the U.S. Capitol,” Jill Sanborn, Assistant Director in charge of the counterterrorism division of the FBI, told the Committee on Homeland Security and Governmental Affairs and the Committee on Rules and Administration (pdf). “We expect racially or ethnically motivated violent extremists, antigovernment or anti-authority violent extremists, and other domestic violent extremists citing partisan political grievances will very likely pose the greatest domestic terrorism threats in 2021 and likely into 2022,” Sanborn said. She added that known driving factors of domestic violence extremism include “racism, anti-Semitism, perceived government or law …