I've long been a consumer and admirer of Congressional Research Service [CRS] reports. They contain well-vetted information and are as politically neutral as possible, given that CRS depends on money from Democrats and Republicans in Congress. Lawmakers view CRS as their think tank and research arm and want to be the purveyors of CRS products. [If you've ever gotten a packet of information from a member of Congress, it probably included several CRS products.] Some in CRS would like to distribute directly to the public, but Congress won't allow it.
However, the good old Department of State provides CRS reports to its embassies and through its Foreign Press Center. That's where people like you and me can go directly. Happy hunting!