Complex sentence: Cámpora represented the left wing, while López Rega represented the right wing; under López Rega's influence, Isabel Perón also favored the right wing, and were thought of by the left as the "entorno".
Split into simpler sentences: Cámpora represented the left wing, while López Rega represented the right wing. Under López Rega's influence, Isabel Perón also favored the right wing, and was thought of by the left as the "entorno".