On her second album with her Fly Or Die band, Jaimie Branch becomes a political polemicist; the album’s heart is the 11-minute “Prayer For Amerikkka,” a two part song-poem that tackles racism, both individual and structural, and the plight of immigrants. Branch recites razor-sharp lyrics over a crawling, Mingus-esque blues vamp. Other tracks like “Simple Silver Surfer” and “Nuevo Roquero Estéreo” just let the band — bassist Jason Ajemian and drummer Chad Taylor from the debut, and new cellist Lester St. Louis — groove, and that’s fantastic too.