US terrorism alert warns of politically motivated violence

Homeland Security Secretary nominee Alejandro Mayorkas testifies during his confirmation hearing in the Senate Homeland Security and Governmental Affairs Committee on Tuesday, Jan. 19, 2021, on Capitol Hill in Washington. (Bill Clark/Pool via AP)

FILE - In this Jan. 6, 2021, file photo U.S. Capitol Police secure a door as rioters try to break into the House Chamber at the U.S. Capitol in Washington. (AP Photo/J. Scott Applewhite, File)

FILE - In this Wednesday, Jan. 6, 2021 file photo, Trump supporters try to break through a police barrier at the Capitol in Washington. Right-wing extremism has previously mostly played out in isolated pockets of America or in smaller cities. In contrast, the deadly attack by rioters on the U.S. Capitol targeted the very heart of government. It brought together members of disparate groups, creating the opportunity for extremists to establish links with each other. (AP Photo/Julio Cortez, File)

WASHINGTON — The Department of Homeland Security issued a national terrorism bulletin Wednesday warning of the lingering potential for violence from people motivated by antigovernment sentiment after President Joe Biden’s election, suggesting the Jan. 6 riot at the Capitol might embolden extremists and set the stage for additional attacks.