The rappers Pablo Hasel and Valtonyc are both in prison, with substantial sentences, for political statements in their songs (and in Hasel's case, Twitter posts which don't even begin to approach Trump's in offensiveness).

https://www.facebook.com/Absolucionpablohasel

https://www.telesurtv.net/english/news/Spain-Supreme-Court-Sentences-Rapper-Valtonyc-to-3.5-Years-In-Prison--20180220-0030.html

I guess the rap community is onto this, but it needs to be known more widely.