History
The Political Question Doctrine in Judicial Review
Quick fact
The political question doctrine was famously articulated in Baker v. Carr (1962), where the Supreme Court listed six factors to identify such issues, including a 'textually demonstrable constitutional commitment of the issue to a coordinate political department'—meaning some constitutional questions are for Congress or the President, not the courts, to decide.
Why this is interesting
Why would the Supreme Court refuse to decide a case even when the Constitution seems to be violated? Some issues are considered 'political questions' that courts must leave to elected officials.