In the run-up to Tuesday's Democratic primary for the U.S. Senate in Minnesota, the immigration debate has emerged as a contentious issue, with establishment-backed Rep. Angie Craig and progressive Lt. Gov. Peggy Flanagan locked in a tight race. The backdrop for this contest is the tense standoff between protesters and U.S. Immigration and Customs Enforcement (ICE) agents that erupted last year when ICE staged operations at the Bishop Henry Whipple Federal Building in Minneapolis, leading to two fatal shootings. Craig, who initially voted for tighter immigration enforcement, has faced criticism for her stance from Flanagan and progressive voters disillusioned by her initial support of ICE. The immigration debate adds another schism to a race that mirrors wider left-versus-center divides in American politics this year. As the primary unfolds, the remnants of the protests still linger around the Whipple federal building, with volunteers maintaining a vigil for those released from immigration detention or attending hearings at the nearby immigration court.