This time, the justices explain themselves.
The court split 4-4 in what could have been a major election decision.
Some possible answers to these questions from leading experts on the subject.
After a presidential pardon, Arizona's most notorious former sherrif is not a reformed man.
A proposition approved last week will require a majority of city voters to approve any future stadium project that uses more than $5 million in public money.
Barack Obama's recent endorsement of Canadian Prime Minister Justin Trudeau is an example of why not all foreign efforts to influence elections are wrong.