U.S. Secretary of State John Kerry says there has been a "total failure" by Venezuela's government in keeping its promises to the opposition,
including respect for the rights of protesters.
Kerry said during a visit to Mexico City Wednesday that an "impatience" is growing in what he calls the neighborhood of Latin America and that the United States is part of that neighborhood.
President Nicolas Maduro's government agreed last month to free jailed anti-government protesters and set up a panel to investigate the deaths of 42 demonstrators on both sides.
The opposition pulled out of talks with the government, saying officials have done nothing and that protesters are still being arrested.
A U.S. Senate panel has approved sanctions on Venezuelan officials responsible for violence against the marchers.
While the Maduro government has the support of many poor Venezuelans, the opposition says many others are fed up with rampant crime, food shortages, and inflation.