Complex sentence: Communists, left-wing politicians and radical anti-military politicians were arrested and not even allowed to run as independents, although anti-war politician Saito Takao who was expelled from the diet in 1941 was re-elected again.
Split into simpler sentences: Communists, left-wing politicians and radical anti-military politicians were arrested and not even allowed to run as independents. Besides, anti-war politician Saito Takao (斎藤隆夫) who was expelled from the diet in 1941 was re-elected again.