There are quite a few good Think-Tanks out there, some with a liberal bias, some with a conservative bias and some that try to remain unbiased.
The Brookings Institution
One of the more respected and unbiased ones is the Brookings Institution. This is a good source for in-depth thoughts about the news and government policies. Visit them on the web at https://www.brookings.edu
If you would like to sign up to receive some of their various newsletters, visit https://www.brookings.edu/newsletters/
Separating Hate Groups from Valid Think-Tanks
Unfortunately, there are a number of hate groups that masquerade as think-tanks, institutes and research organizations. You can find a list of known hate groups at The Southern Poverty Law Center.
Southern Poverty Law Center – https://www.splcenter.org
The Southern Poverty Law Center is an American nonprofit legal advocacy organization specializing in civil rights and public interest litigation.