Unprecedented Latin American opposition to U.S. sanctions on Cuba left President Barack Obama isolated at a summit on Sunday and illustrated Washington's declining influence in a region being aggressively courted by China.

. . . Obama has had a bruising time at the two-day meeting in Colombia of some 30 heads of state.

. . . In an ironic twist to the debate, U.S. Secretary of State Hillary Clinton went dancing in the early hours of Sunday at a Cartagena bar called Cafe Havana, where Cuban music is played.