Chief Justice John Roberts has led the Supreme Court 's conservative majority on a steady march of increasing the power of the presidency, starting well before Donald Trump's time in the White House.

The justices could take the next step in a case being argued Monday that calls for a unanimous 90-year-old decision limiting executive authority to be overturned.

The court's conservatives, liberal Justice Elena Kagan noted in September, seem to be “raring to take that action.”

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They already have allowed Trump, in the opening months of the Republican's second term, to fire almost everyone he has wanted, despite the court's 1935 decision in Humphrey's Executor that

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