A demonstrator holds a homemade poster in front of a cordon of National Bolivarian National Guard during a protest near the Cuban embassy in Caracas, Venezuela, Tuesday, Feb. 25, 2014. Opponents of President Nicolas Maduro marched to the Cuban Embassy to protest what they consider the communist nation's interference in Venezuela's internal affairs. (AP Photo/Rodrigo Abd)CARACAS, Venezuela (AP) — Former U.S. President Jimmy Carter is expressing concern about Venezuela’s escalating political crisis and wants to meet with leaders on both sides in an upcoming trip.

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