I'd pay a approximately $10 monthly fee for this if it was minimally biased and had wide coverage of all news stories. I'm unsure if enough people would to become profitable, but some market exists.

For some long running stories that I only tune into occasionally, such as the Muller Investigation, I do not have enough context to fully understand the newest headlines. The only place where full comprehensive coverage will be in one place is in a book, and while I often buy books of that genera it will not be released until after the topic is concluded. This seems to be a one-stop-shop for everything about a news topic.

I think you'll have more success if you find a niche to start with. Maybe US National Politics & Economics, which covers your two examples. Finding your zone and sticking to it can separate you from the mainstream news which follows hype much better than a startup organization can.

I think this type of project is a great candidate for Crowd Funding. Crowd Funding can give positive reinforcement for a product/market fit and to help attract journalism talent.