The NAACP has always been political. If they can condemn a candidate, how is that not supporting another candidate? In 2004 Julian Bond, NAACP chairman gave a speech against Bush/Cheney. IRS investigated and determined they did not violate 501c3. But that is a lie. If you take a political stand against a President how is that not endorsing another who will run against him. By this definition the Church can speak against any political person running for office and still remain 501c3. See, histphil.org/2018/11/26/choosing-between-financial-viability-and-a-political-voice/ "A History of the NAACP's Tax Status"
See also, depts.washington.edu/moves/NAACP-intro.shtml "Mapping American Social Movements" for this quote. "Scholars emphasize the organizations national initiatives, the political lobbying and puiblicity efforts handled by the headquarters staff in New York and Washington D.C....."
Concerning the SPLC, see c-fam.org/home/the-truth-about-splc/ "C-Fam Center for family and human rights" See this quote, "Below you will find a powerful video exposing the Southern Poverty Law Center and their stated goal of destroying their political opponets...."
Make no mistake, the NAACP and SPLC are in bed together and march in step. They are political at the core.
Good-Ole-Rebel