Is this the week that the US campus protests peaked? The combination of police clearances, inter-factional violence in Los Angeles, politicians weighing in and the end of the academic term suggests it may well be - at least in its current phase. The movement has certainly left a mark on US politics - and may do so again later in the year. A student movement is always difficult to sustain during the long summer months when there are few students on campus. Apart from graduation ceremonies over the next fortnight, there are few opportunities for drawing attention - which is...