The past 12 years have seen significant US high court decisions with wide-ranging effects on personal freedoms and national politics. Another key ruling is expected this summer on President Obama's health-care reform law. Here are some recent top rulings, all decided by 5-to-4 votes.
Idaho is one of four states that do not permit criminal defendants to claim they are innocent by reason of insanity. On Monday, the US Supreme Court declined to take a case testing whether an insanity defense is a constitutional right.
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