Original sentence: For example, in the middle 20th century the Republican Party was sometimes divided between "Wall Street" (liberal) and "Main Street" (conservative) factions, of which the latter came to predominate late in the century.The novel Main Street, a critique of small town life, was penned by the American writer Sinclair Lewis
Edited sentence: For example, in the middle 20th century the Republican Party (United States) was sometimes divided between "Wall Street" (liberal) and "Main Street Republican" (conservative) factions, of which the latter came to predominate late in the century.The novel Main Street, a critique of small town life, was penned by the great American writer Sinclair Lewis