NPR has sent its political reporters to 90-minute hostile-environment awareness training, which in its typical form lasts a few days and prepares journalists for covering war zones or regions where terrorists are active.

News organizations, government agencies and nongovernmental organizations generally employ this type of training to help employees respond to hazards such as riots, mortar attacks, kidnappings or firefights.

In this case, NPR’s scaled-down sessions might be called Trump Training.

Although there have been no mortar attacks, Trump’s campaign rallies are generally rowdy affairs in which violence has occasionally flared. The candidate canceled one of his rallies in Chicago this month out of concerns that protests against him had become too volatile.