Unprecedented Latin American opposition to U.S. sanctions on communist Cuba left President Barack Obama isolated at the Summit of the Americas on Sunday and illustrated Washington's waning influence in the region.

In contrast to the rock-star status he enjoyed at the 2009 summit in Trinidad and Tobago shortly after taking office, Obama has had a bruising time at the two-day meeting in Colombia of some 30 heads of state from across the Americas.

Eleven Secret Service agents and five military personnel were caught in an embarrassing prostitution scandal, Brazil and others have bashed Obama over U.S. monetary policy, and he has been on the defensive over calls to legalize drugs.
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Thanks to the U.S. and Canadian line on Cuba, the heads of state were unable to produce a final declaration as the summit fizzled out on Sunday.

"There was no declaration because there was no consensus," said Colombian President Juan Manuel Santos, who hosted the summit.

"That is not a failure, on the contrary," he said, trying to spin the outcome and frank exchange of different views as a sign of strength.

At a press conference with Santos, Obama responded to a question about Cuba by saying that while his administration has eased travel by Cuban Americans to Cuba, the Cuban government had not taken steps toward democracy and "has not yet observed basic human rights."

The prostitution saga, above all, was a major blow to the prestige of Obama's Secret Service bodyguards and turned into the unexpected talk of the town in the historic city of Cartagena.