The cases explore whether Congress violated the Constitution when it allowed the Federal Communications Commission to gather fees to help pay for critical telecommunications services in communities that might not otherwise have it.

Along with agreeing to hear the case, the Supreme Court told attorneys on both sides of the case to be prepared to argue whether the case is moot because of the challengers' failure to seek preliminary relief before the Fifth Circuit.

The Supreme Court could further weaken the power of federal agencies by agreeing to hear a dispute over a Federal Communications Commission program that requires companies to subsidize telecommunications services in under-served areas.

The Supreme Court agreed Friday to wade into a fight over Congress’ ability to delegate power to federal agencies — opening the next chapter in a decadeslong effort by conservatives and business interests to reduce the power of the federal government.