"The summit collapsed," Cabello added during the party's weekly press conference in the capital Caracas.
According to Cabello, the regional gathering, which took place in Los Angeles, in the western U.S. state of California, "was not a summit at all and will likely be the last, due to its failure, the disaster and the way it was handled."
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The summit was set to fail from the start when the United States decided not to invite Venezuela, Cuba and Nicaragua, he said.
Washington's exclusion of the three countries led several heads of state and government to skip the summit in protest.