Royal Canin U.S.A., Inc. v. Wullschleger

·2025

What the Court Decided

Held that a plaintiff's voluntary abandonment of federal question claims completely deprives a court of original jurisdiction, but an involuntary dismissal does not eliminate supplemental jurisdiction because the claims may be reinstated on appeal.

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Cited In

Hain Celestial Group v. Palmquist

2025 Term · 24-724

Respondent argued its rationale controls: just as a dismissed federal claim retains jurisdictional significance for supplemental jurisdiction purposes while subject to appellate review, a dismissed non-diverse party retains jurisdictional significance until the dismissal is finally resolved.