Brazilian President Dilma Rousseff on Tuesday postponed a state visit to Washington over allegations of US cyberspying on her country. Rousseff announced the decision after discussing the spying row with US President Barack Obama Monday in a telephone call. \"The two presidents decided to postpone the state visit since the outcome of this visit should not be conditioned on an issue which for Brazil has not been satisfactorily resolved,\" a statement from Rousseff\'s office said.