Complex sentence: The politically aware song became Wonder's fourth Number 1 pop hit, his tenth Number 1 soul hit, and was one of his angriest political statements, aimed squarely at former President Richard Nixon.
Split into simpler sentences: The politically aware song became Wonder's fourth Number 1 pop hit and his tenth Number 1 soul hit. It was one of his angriest political statements and was aimed squarely at former President Richard Nixon.