http://www.lindashoemaker.com/swaction_04_11_05.htm
One of the other guys is a journalist cum data miner, with apparantly anti-gun leanings (SHOCK!)
https://www.policyarchive.org/bitstream/handle/10207/5845/nraallycontr.pdf?sequence=1
No doubt a link will get back to the principals, so if they can demonstrate the objectivitiy and lack of creative editing in their data, then they will be a useful tool.
Absent independent vetting (not from another 'progressive' outfit, thank you very much) their information cannot be considered objective. And that's a shame, because there should be 100% transparency in any and all political contributions. Ya know, they talk about using information on contributions to educate kids, I hope they also encourage kids to question everything, including the sources of such 'information'