By Ariane de Vogue, CNN Supreme Court Reporter
(CNN) -- The Supreme Court said Thursday that federal courts must stay out of disputes over when politicians go too far in drawing district lines for partisan gain -- a ruling that could fundamentally affect the balance of power in state legislatures and Congress.
Chief Justice John Roberts wrote the 5-4 decision for the conservative majority.
The court was asked to consider when politicians go too far in drawing lines for partisan gain in a set of cases arising from North Carolina and Maryland.
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The North Carolina case was brought by Democrats challenging Republican-drawn maps, while the Maryland case was brought by Republicans challenging a Democratic map.
This story is breaking and will be updated.
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