How did the Supreme Court rule in INS v. Chadha?
In this case, the Supreme Court ruled that a one-house legislative veto was unconstitutional.
The law that was being challenged allowed either house of Congress to overturn it when the attorney general had vetoed the suspension of a deportation order. The attorney general could suspend a deportation order if the deportee appealed. If the attorney general did so, either house of Congress could overrule that action.
In Chadha, the Supreme Court ruled that this was unconstitutional. They ruled that it violated the idea that Congress should be bicameral. It also violated the president's power to veto laws.