Make no mistake about it, Hillary Clinton is to Barack Obama’s left on the issue of illegal immigration. On no other single issue is the contrast between her and Donald Trump more apparent. He wants to build a wall across the Mexican border, deploy a system of mass deportations, and streamline the legal immigration process to discourage otherwise law-abiding immigrants from breaking the law. His border policy emanates from a broader America First ideology that is seen as backwards and even dangerous by Hillary Clinton. Her policy, as she reiterated this week in Washington, is much different. Unbelievably, she is...