The 7th Congressional district race in northern Wisconsin has gone radical. Or perhaps not. Last month, Republican Congressman Sean Duffy of Weston accused the liberal California-based political action committee CREDO of following him around as he campaigns in his district, calling them “San Francisco radicals.” CREDO President Becky Bond says Duffy is part of their “Take Down the Tea Party 10” campaign. But she says it’s Duffy who’s radical.