The Supreme Court considers a case that could significantly alter presidential authority over independent federal agencies, potentially overturning the 90-year-old precedent set in Humphrey's Executor (1935).Donald Trump challenges the removal of Rebecca Slaughter from the FTC, while Chief Justice John Roberts has consistently authored opinions reducing restrictions on presidential removal power.Outcomes, expected later this term, could redefine the balance of power in the USA, with another related case concerning Federal Reserve Governor Lisa Cook scheduled for next month.