President Trump is being misled into a regime-change war close to home. Few Americans nowadays find much to celebrate in the Iraq War or the intervention that overthrew Libya’s Muammar Gaddafi. Regimes were successfully changed both times, but what came after the dictators’ downfall was civil war, regional instability and mass-migration flows that exported many of those nations’ troubles to their neighbors. Now the Trump administration wants to do to Venezuela’s despot, Nicolás Maduro, what George W. Bush did to Saddam Hussein and Barack Obama did to Gaddafi. That will predictably do to the Americas – including the US –...