Answer:
The Republican Party was formed in 1854, by former members of the Whig Party that supported abolitionism and protectionist trade policies, aimed at industrializing the country rather than trade with other nations. Therefore, during the period before the Civil War, the Republican Party was a fervent defender of the fight against slavery and a promoter of national industry.
During the Gilded Age, after the Civil War, the Republican Party was predominant at the national level and could, in this way, impose the conditions for which it had been fighting since its foundation: the equality of civil rights, the industrialization of the country and the economic development of society.
Therefore, it could be said that both in the Antebellum Period and in the Gilded Age, the Republicans maintained their values in terms of industrialization, the rights of African Americans and the economic growth of cities.