Introduction to a useful technique to develop your topic.

Published reports from a variety of state legislative and executive agencies.

Especially their "research" tab

"Provides states with non-partisan, well-conceived and well-drafted legislation that brings clarity and stability to critical areas of state statutory law."

"America’s largest nonpartisan, voluntary membership organization of state legislators dedicated to the principles of limited government, free markets and federalism.".

A collection of data repositories that may include some policy sources.