The administration described fentanyl flow declining by a precise percentage. The available federal numbers primarily measure what officers intercepted.

FactCheck.org spoke with researchers who warned that total illicit flow, including undetected shipments, cannot be directly calculated from seizure data.

This Fiction verdict is about the asserted certainty of an unmeasurable total. It does not say fentanyl trafficking could not have decreased, nor dismiss the public-health importance of reduced overdoses.