By Kanishka Singh and Brendan O’Brien (Reuters) -The law enforcement response to the Uvalde school shooting that killed 19 children and two teachers was “an abject failure” in which a commander put the lives of officers over those of the children, Texas Department of Public Safety (DPS) Director Steven McCraw said on Tuesday. The onsite commander made “terrible decisions” and officers at the scene lacked sufficient training, costing valuable time during which lives may have been saved, McCraw told lawmakers during a Texas Senate hearing into the May 24 mass shooting. “There is compelling evide…