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.
On Monday, the court is scheduled to hear a Florida case involving the death penalty as applied to those deemed to be mentally retarded – in this case, Freddie Lee Hall, who has a low IQ.
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