Detailed Analysis:

• Claim: A federal appeals court invalidated a centerpiece of President Trump’s economic strategy, finding that a 1977 law did not authorize the tariffs.
• Verification Source #1: States that Governor Newsom filed a lawsuit to end President Trump's tariffs, requesting the court to declare the tariffs void because the President lacks authority.
• Verification Source #2: States that the court was not asked to address tariffs but to allow the Trump administration time to request the Supreme Court take up the case.
• Verification Source #3: States that the court was not asked to address some industry-specific tariffs Trump.
• Verification Source #4: States that the Trump administration has 10 days to halt his sweeping tariffs and ask the Supreme Court to rule on the constitutionality on its tariff plan.
• Assessment: Contradicted. Sources 2, 3, and 4 indicate the court was considering *whether* to allow the tariffs to continue while the Supreme Court considers the case, not that the court invalidated the tariffs based on a 1977 law. Source 1 indicates a lawsuit was filed challenging the President's authority.