US-Brazil diplomatic frictions center on reciprocal measures over ambassador approvals and visa denials, with the August 2026 revocation of Brazilian Ambassador Maria Luiza Ribeiro Viotti’s visa explicitly distinguished from expulsion by US officials and tied to Brazil’s delay in accepting nominee Daniel Perez ahead of October elections. No subsequent actions have escalated to formal expulsion of any diplomat, while recent bilateral trade talks and presidential contacts signal efforts to stabilize relations without further confrontation. Trader consensus at 97.5% against expulsion by September 30 reflects the absence of such moves in the current standoff and the reversible nature of existing steps. Late developments, such as a breakdown in post-election agrément negotiations or an unrelated incident prompting persona non grata declarations, remain the primary variables that could alter probabilities before the deadline.