Complex sentence: He unsuccessfully lobbied against the constitution in the 1958 national referendum, and resigned from his position on the Constitutional Council in 1960 to protest the growing power of Charles de Gaulle's presidency.
Split into simpler sentences: He unsuccessfully lobbied against the constitution in the 1958 national referendum. He resigned from his position on the Constitutional Council in 1960 to protest the growing power of Charles de Gaulle's presidency.