A bit more on it:
https://www.fedsmith.com/2019/04/20/c-fund-esg-tsps-future/Apparently they want to mimic a fund called the S&P ESG Fund. Fedsmith seems to be staffed by libs, so it was interesting to read the "what a good idea!" perspective of the author, then read the comments. A larger percentage of the people who read Fedsmith, Govt Executive, etc., are generally left leaning, but all the comments are telling them to drop dead and go to hell. I guess it matters when it's your money and not other people's money.
The idea of these kinds of funds is scary. As the article said, this all started with divesting from the tobacco industry, but as can be seen in the article, has been greatly expanded, and there seems to be no "cap" on what is socially acceptable (or not) to these idiots, and their criteria are pretty ambiguous:
Climate Change
Fossil Fuels
Nuclear Energy
Diversity
Human Rights
Also of note is something I was unaware of: Even if they just add a separate fund you can opt-in to, it raises the costs of ALL funds, so it still screws all investors in the TSP.