Yes the important stuff is public record, but it's also hard to analyze the primary sources. Bills tend to have misleading names, mixed content, and non-obvious agendas. Context is important; it's not uncommon for someone to oppose a weak bill because politically the alternative is a stronger one, not inaction. The FEC database is hideously formatted anomaly-filled MS Access stuff. I generally let someone else do the analysis, but then that's "news" (or at least subject to the same pitfalls?).