McALLEN, Texas—Two heavily armed suspected smugglers drive down a dirt road to hand their cargo of illegal aliens over to the next vehicle. One, the front passenger, is filming the bumpy drive with one hand, while pointing an AR-15 with a drum magazine out the windshield. They’re speaking Spanish, talking about how much farther to go. At one stage, the driver communicates over a radio to say, “I’m there, I’m there, hold on.” Suddenly the vehicle arrives at a gate, where a pickup truck is waiting on the other side, and the driver and passenger yell to their cargo, “All of you, all, all, all, run, run,” along with a lot of cursing. The backseat passengers jump out and run to the waiting vehicle. The incident occurred in Jim Hogg County, Texas, about 70 miles north of the U.S.–Mexico border. Landowners and ranchers dozens of miles north of the border …