If you stick with it and it ends up working out, this could be the start of something really interesting.
What are your plans to monetize? It seems that the NPR model works somewhat, but maybe there are other ways.
I worry that the market for nonsensationalized news might be small, but again, you have NPR as an example, so at least there's a niche. Worst case, this could probably work as a hobby, facts are useful in that once you put them on your site, they don't have to be updated much.
Good luck.
Edit: minor point: sources could be clickable.
On the flip side, we don't want to lock the majority of content behind paywalls, which seems to be the way a lot of better news sources seem to be going today.
We'd like to have all our content be accessible for free, and subscribers would get various additional benefits: no ads, the ability to manipulate charts and graphs more directly (perhaps a way to adjust the scope beyond what we display, make projections and share with friends), mobile app with nice interface that requires subbed account, etc.
As for the market - we think it might be possible to serve as a secondary news source for people that want hard info on an issue/event, or the background/context to get up to speed on something (hopefully the range of people interested in this would cross party lines and even into groups that don't have the time or interest to keep up with politics on a daily basis).
++ Supporting facts/sources: relatively objective news sources that back up their material are definitely an interesting idea to me
+ General visual style: clean, modern, easy on the eye, no major flaws that jumped out at me
And some hopefully constructive criticisms:
- Context/scannability: even if you're going to provide information in depth, I think some sort of summary and a guiding narrative would be helpful (by analogy with "inverted pyramid" writing style for plain text articles) or I'm not going to know why I should care unless I already know the subject anyway and I'm not going to find my way around fast enough to get into the deeper material
- Discoverability: because there is no narrative path to guide me through the content there is also nothing to highlight interesting patterns in all that data or key points unless either they stick out like a sore thumb on a graphic or I find a relevant bit of text in one or other of the tabbed sections; also, there are so many tabs and separate displays that I find it hard to browse while keeping track of what I've seen already
- Navigation: occasional visual details don't quite work, e.g., a two-tab layout with two columns underneath, where the tab labels look like misaligned column headings; navigation is generally rather complicated because there are so many show/hide options, and the navigation controls are not as visually distinct from things like static summary/heading information as they could be
Now, making a useful research medium (when a motivated individual is pulling data) is very useful.
https://duckduckgo.com/?q=data+journalism
Out of curiosity, what's your tech stack?
The key missing from news is "axioms": fundamental notions which mold what the reader is interested in and how news is perceived. (Gotta run, more later if I can...)