If President Barack Obama's goal at the fifth Summit of the Americas in Trinidad and Tobago this weekend was to be better liked by the region's dictators and left-wing populists than his predecessor George W. Bush, the White House can chalk up a win.

If, on the other hand, the commander in chief sought to advance American ideals, things didn't go well. As the mainstream press reported, Mr. Obama seemed well received. But the freest country in the region took a beating from Venezuela's Hugo Chávez, Bolivia's Evo Morales, and Nicaragua's Danny Ortega.

Ever since Bill Clinton organized the first Summit of the Americas in 1994 in Miami, this regional gathering has been in decline. It seemed to hit its nadir in 2005 in Mar del Plata, Argentina, when President Nestór Kirchner...