WASHINGTON, Sept 19, 2013 - Spying allegations and a delayed state visit have breached once-strong ties between the United States and Brazil, and only time will rebuild trust, analysts said Wednesday.
"This is a very unfortunate incident," said Riordan Roett, director of the Latin American studies programme at Johns Hopkins University.
"The US government had hoped to created a much stronger relationship with Brazil, which is the most important country in the region, and clearly this is not going to happen."
Brazilian President Dilma Rousseff's indefinite postponement of her long-planned visit to Washington marks a clear setback in the two countries' efforts for rapprochement.
The visit had been scheduled for October 23 but was called into question after documents leaked by the former National Security Agency intelligence contractor revealed the widespread American spying on its Brazilian ally.
Rousseff has lashed out at the "illegal" practices, saying they represent a "serious act which violates national sovereignty and is incompatible with democratic coexistence between friendly countries."
"My sense is that there is so much anger on the Brazilian side, and confusion on the American side, it will be probably very difficult to reschedule the state visit during the remaining part of her term," said Roett, who has authored several books on the South American giant.
"Probably the dialogue is going to be relatively frosty between Brasilia and Washington for some while to come."
Rousseff's four-year term ends in January 2015 but she is widely expected to run for re-election in the October 2014 vote.
Paulo Sotero, director of the Wilson Center's Brazil Institute in Washington, noted that Rousseff had invested more effort than any of her predecessors in rebuilding relations with Washington.
Ties were often prickly under Rousseff's predecessor and mentor Luiz Inacio Lula da Silva, who had brokered a deal with Turkey on Iran's nuclear enrichment programme.
US President Barack Obama had made it a priority to improve ties with Latin America's economic powerhouse.
"It is especially important to rebuild a climate of mutual trust that no longer exists," Sotero told AFP.