Holding: Court declines to hear case ruling that the issue presented is a political question.  Article IV – 4 (Guaranty Clause) “The United States shall guarantee to every state in the Union a Republican form of government…” It is not for the court to decide what a Republican form of government is.
Brennan distinguishes political questions from political cases.  “The doctrine of which we treat is one of political questions not one of political cases.