WASHINGTON —

The Supreme Court is set to hear a case Monday challenging a nearly century-old precedent that protects independent agencies from political interference.

The case will revisit a 90-year-old rule known as "Humphrey's Executor," which has historically blocked presidents from firing heads of independent agencies without cause.

The Supreme Court, which ruled on the case back in 1935, previously barred presidents from firing agency heads, ensuring that they remain free from political pressure.

But the Trump administration says the case and rule are unconstitutional, siding with conservative arguments that see agencies as an extension of the executive branch.

President Donald Trump has already put the argument into action, firing Rebecca Slaughter , a former commissioner of t

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