A federal judge is looking into placing short-term limits on how government officers can apply force during gatherings in Portland, Oregon, in the wake of incidents where agents released teargas into a group that had kids present over the weekend. Crowds numbering in the thousands assembled outside an Immigration and Customs Enforcement center on Saturday, in an event that the city's mayor, Keith Wilson, called largely non-violent, with most participants breaking no rules or presenting any risk to the officers.