1. Identify all clusters of power and opinion, eg. Republicans, Democrats, Chinese Communist Party, UK Labour Party, Green Party, etc.
2. Associate each cluster with news organizations that tightly align with their policies.
3. Evaluate stories - headlines in only one cluster (under reported elsewhere) represent a view. Headlines that have different takes, likewise, give you a spectrum of thought on an issue or topic.
4. Collect fine points and build a report. Bonus for providing contrasting opinions and associating them with the party/power responsible for that thinking.
I want this tool. It'd be okay if it wasn't perfect. Just getting 80% of the way there would be incredibly valuable. I'd pay for it.