I am attempting to research a certain political issue across state legislatures.
Specifically, I'm attempting to compile information regarding which states have debated a specific issue in their legislature recently, as well as the results of any proposed bill, data on who sponsored the bill, those persons' voting records, etc.
I have had some success compiling this information by going to individual state legislature's websites. However, many of them don't appear to publish much of this data online.
How does one go about conducting such political research? Is there any sort of service providing a centralised database?