The opposition considers the bans unlawful, and Washington has rejected any roadblocks to opposition candidates' race to the presidency. The agreement to be signed on Tuesday would lift all public office bans, one opposition source told Reuters, but its wording is too vague to inspire confidence that Maduro will honor the deal. Four other opposition sources agreed, with one saying the deal was largely negotiated by the United States. "We all have our doubts, but we're exhausting our options," said another opposition source. The U.S., which is expected to loosen some sanctions in recognition of the government-opposition deal, will act only once the deal has been signed, sources told Reuters on Monday.

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Persons: Nicolas Maduro, Venezuela Milton Rengifo, Leonardo Fernandez Viloria, Maria Corina Machado, There's, Maduro, What's, Benigno Alarcon, Andres, Alarcon, it's, Marianna Parraga, Mayela, Deisy Buitrago, Julia Symmes Cobb, David Gregorio Our Organizations: REUTERS, Rights, Reuters, Maduro's, United, Andres Bello Catholic University, Mayela Armas, Thomson Locations: Venezuela, Miraflores, Caracas, Rights CARACAS, HOUSTON, Barbados, Washington, United States, U.S, Doha, Houston