By Julio-Cesar Chavez and Kanishka Singh WASHINGTON (Reuters) – A surveillance video showing a long delay by Texas police and federal agents before they acted to stop the mass shooting at Uvalde’s Robb Elementary School shows that their response was “indefensible,” U.S. Senator Ted Cruz said on Wednesday. The publication of the edited video on Tuesday by the Austin American-Statesman outraged the families of the victims. They not only objected to having to see the minutes before their loved ones were gunned down, but also to witnessing the long delay before officers confronted and killed the g…