Ted Cruz blocked immediate passage of the Artificial Intelligence Risk Management and Security Act in the US Senate on September 29. Mark Warner had asked to pass the proposal by unanimous consent. The official daily log records Cruz's objection.
The previously announced proposal concerns oversight of advanced AI. Warner, Brian Schatz and Andy Kim spoke that morning about safety rules and human control.
A single objection is enough to stop this fast-track procedure. There was no recorded vote in which a Senate majority rejected the substance of the bill.
AI Incidents records the procedural step as a policy risk signal, distinct from the earlier introduction of the proposal. It establishes neither the bill's final defeat nor a new autonomous AI incident.