President Trump’s decisive action against the illegitimate Maduro regime in Venezuela has focused world attention on the Western Hemisphere. This is all to the good, as the Trump administration has made clear the priority Washington attaches to its own neighborhood. The recent National Security Strategy emphasized that after three decades of counterproductive wars in the Middle East and South Asia, this administration would prioritize defense of the American homeland and our own hemisphere. It further established the “Trump Corollary” to the Monroe Doctrine, holding that “extra-hemispheric powers” (think China, Russia, and Iran) would not be permitted to meddle in the...