The claim contains two distinct parts: 1) The US Federal Reserve preparing for a new chief while maintaining political independence, and 2) TotalEnergies facing calls for a windfall tax. Evidence confirms that a nominee (Kevin Warsh) is facing a confirmation fight to become the next Fed chair (web_search: 3 takeaways as Trump's Fed pick faces a confirmation fight; web_search: Fed chair pick Kevin Warsh). This confirms the first part of the claim. However, none of the provided evidence mentions TotalEnergies or any calls for a windfall tax related to it. Since the second half of the claim is unsupported, and the first half is only supported by web search results related to a specific nomination, the claim cannot be fully corroborated. Because the second half is completely unsupported, the overall claim is marked as single_source based on the limited scope of the evidence provided for the first part, and the lack of evidence for the second part.