Original sentence: Those who have voiced support for impeachment include one Republican and several Democratic members of the United States Congress, various other politicians and government officials, anti-war demonstrators, scholars, authors, Marxist and Trotskyist organizations, left-leaning opinion columnists, and others in the international community
Edited sentence: Those who have voiced support for impeachment include one Republican and several Democratic members of the United States Congress, various other politicians and government officials (chiefly from the extreme left-wing fringe of American politics), anti-war demonstrators, scholars, authors, Marxist and Trotskyist organizations, left-leaning opinion columnists, and others in the international community