SAO PAULO -- With the help of Brazil, South Americas largest economy, Venezuela has joined the regional economic alliance Mercosur, once heralded as the continents answer to the European Union.
But the addition of Venezuela has angered one of the 21-year-old trading blocs founding members, Paraguay, which considers the move retribution for the June impeachment of its president, Fernando Lugo. In addition to Brazil, the other members of Mercosur are Argentina and Uruguay.
Many are also questioning the impact of adding a country led by Hugo Chavez, a staunch critic of U.S. foreign policy and a frequent and capricious intervener in the free-market economy. The 57-year-old Chavez has had three cancer surgeries but says hes in remission and is running for re-election in October.
Will Venezuelas addition do little more than provide Chavez with a larger stage and potentially damage Mercosurs credibility? Or could it be a masterstroke by Brazil to strengthen its regional influence and potentially rein in the unpredictable Chavez?
Its already difficult to negotiate with other groups like the European Union because of Argentina. What will happen when Venezuela is at the table? Sergio Amaral, trade minister to former Brazilian President Fernando Henrique Cardoso, asked in an interview.
Amaral referred to Brazils neighbor, which in recent years has been the source of numerous trade disputes.
Mercosur, formed in 1991 with the Treaty of Asuncion, named for Paraguays capital, where it was signed, was meant to be South Americas answer to the EU, but it has since struggled for relevancy.
It succeeded in convincing the Brazilian business elite to look to South America at a time when the Brazilians had larger ambitions important today because the region is now a key importer of Brazilian manufactured goods.
In recent years though, Brazil has been frustrated by Argentinas import restrictions, as well as its alleged manipulation of inflation and official statistics, something that makes evaluating trade difficult.
Perhaps Mercosurs largest challenge is the enormous disparity between members. In 2011, Brazil accounted for 75 percent of the trading blocs total gross domestic product, while Uruguay and Paraguay each accounted for 1 percent, according to the Buenos Aires economic consultancy Abeceb.
Individual members are also prevented from signing trade agreements on their own. So while non-Mercosur countries such as Chile and Peru have aggressively increased commerce with Asia, Paraguay felt as if it was held hostage by Brazil and Argentina.
The Mercosur summit last month in Mendoza, Argentina, added fuel to the fire.
Brazil, Argentina and Uruguay voted Venezuela into Mercosur as a full-fledged member, a process six years in the making.
They will formalize the decision on July 31 in another meeting, in Rio de Janeiro.
They had suspended Paraguay, the blocs fourth original member, from participating after its Congress impeached Lugo, a move criticized for a lack of due process and described by some as a parliamentary coup.
The Organization of American States is scheduled to meet Tuesday in Washington to discuss Paraguay and to release findings from Secretary-General Jose Miguel Insulza, who traveled there last week.
Paraguays absence in Mendoza allowed Venezuelas entry. Thats because all four Mercosur countries congresses have to approve new members, and Paraguay was the last holdout, objecting because it argued that Chavezs government violated Mercosurs democratic clause.

















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