President Joe Biden called out the Proud Boys as one of the greatest threats to America during his town hall in Milwaukee. University of Wisconsin-Milwaukee professor Joel Berkowitz got to ask Biden about white supremacists and other hate groups during that town hall Tuesday night. "While I appreciate efforts being made to bring them to justice, I worry about ongoing threats to our country from Americans who embrace white supremacy and conspiracies that align with it. What can your administration do to address this complex and wide-ranging problem?" Berkowitz asked the president."I got involved in politics to begin with because of civil rights and opposition to white supremacists, the Ku Klux Klan, and the most dangerous people in America continue to exist. That is the greatest threat to terror in America, domestic terror," Biden said."Are you concerned about white supremacists in Wisconsin?" WISN 12's Terry Sater asked Berkowitz."Sure. We've seen them kill people. We've had things happen in our own backyard," Berkowitz said.In January, Kyle Rittenhouse, charged with killing two people during police brutality protests in Kenosha, could be seen in a Mount Pleasant bar, prosecutors said, flashing "white power" signs while posing for photos and serenaded with the Proud Boys anthem.The same group the president brought up at the town hall."You may remember, in one of my debates with the former president, I asked him to condemn the Proud Boys and he wouldn't do it," Biden said.Berkowitz said he wished the president would have talked more at the Pabst Theater about the underlying causes of hate groups, but he's glad Biden has changed the tone of the conversation from the White House."They are dangerous people," Biden said.The president said he'd like the Justice Department and the civil rights division to focus on hate groups.