Charlottesville exposes new threat for college campuses

Boston — On college campuses, white supremacists and other far-right extremist groups see fertile ground to spread their messages and recruit followers. But for many colleges, last weekend’s deadly attack at a rally near the University of Virginia exposed a new threat.The rally in Charlottesville left universities across the U.S. bracing for more clashes between extremists and the protesters who oppose them. It also left schools in an increasingly tight bind as they try to ensure cam