Student protests threaten to overshadow commencements

Pro-Palestinian student activists have one last opportunity to make a big impact before campuses are barren for the summer: commencement.  

Tens of thousands of families and friends will flock to campuses across the country starting this weekend to see their loved ones celebrate the conclusion of the degree even as the schools crack down harder on the demonstrations, with more than 2,000 people arrested so far.  

Colleges will be keeping a close watch — and will themselves...