Here is the direct link to Upguard's write up (most of the Gizmodo details are here): https://www.upguard.com/breaches/the-rnc-files

It is mostly publicly available data, but not always easily accessible (states have varying requirements and methods of acquisition), firms go through quite a bit to get aggregate files in all 50 states. For them to be put up with no protection is jarring. But not surprising with other recent disclosures.

I only wish we had access to the files to do some queries across them!