(The Center Square) – Arizonans living near the nation’s southern border gave the Republican National Convention some emotional testimony about the realities of life amid an immigration crisis. On day three of the RNC, several speakers addressed the millions of immigrants crossing the nation’s border with Mexico. Included in those were David Lara, a San Luis business owner and activist. “Small towns like mine bear the brunt of the chaos. Imagine crowds rushing the port, overwhelming Border Patrol when they know that they don’t have enough agents to detain everyone,” he told the crowd. “Imagine…