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The US announcing Perez before seeking agrément is the actual breach here, not Brazil's delay. That's Vienna Convention basics. You ask first, you announce after approval. Washington already knows this and did it anyway because the deadline pressure is the point.
Brasília swiftly condemned the US action as part of a deliberate campaign to influence the election. Lula's office said: 'Today's decision is not an isolated incident. It is part of a deliberate escalation of hostile measures against Brazil, motivated by ideological reasons.'
US revokes Brazil ambassador’s visa in escalation of diplomatic feudtheguardian.com