Willie Nelson is supporting Democratic candidate Beto O’Rourke in the Texas Senate race, and now some former fans are no longer singing his praises.

The music legend announced on Wednesday that he’d be headlining a Sept. 29 rally in Austin for O’Rourke, and Nelson made a point to mention that it will be the first public concert he has held for a political candidate, according to Austin360.com.

Nelson said the U.S. representative “embodies what is special about Texas, an energy and an integrity that is completely genuine,” in a press release announcing the rally.

But when Nelson linked to the Austin360 story on his own Facebook page, some fans were angry that the “Red Headed Stranger” was voting like a Blue Stater.