Texas Gov. Greg Abbott has sent a letter to Vice President Kamala Harris—the Biden administration’s point person on immigration issues—demanding answers and action on what he described as an “ongoing humanitarian crisis” amid the surge in illegal crossings that he blamed on the administration’s “open border policies.” Last week, President Joe Biden tasked Harris with stemming the rising tide of immigrants—many of them unaccompanied children—crossing the border illegally into the United States, saying it would be a “tough job” but that she was “the most qualified person to do it.” Abbott, noting in his letter (pdf) that Harris had been named “Border Czar in charge” of the Biden administration’s response to the border surge, called on Harris to clarify what is being done to curb the flow of illegal immigrants into the country and to prosecute human traffickers. He also took aim at policies that he said, “embolden and enrich cartels, smugglers, …