Charles Carroll was a signer of the Declaration of Independence. Continuity and Change: The Irish Role in American Politics Copy. Why were the Irish Democrats? | History Forum Among these groups, the Irish were by far the largest. Irish immigration. ∙ 2011-06-02 19:31:03. It was Peter "P.J." McGuire who first proposed a national holiday for workers. Peter "P.J." McGuire the Father of Labor Day. Political parties of Ireland - RationalWiki what political party did the irish immigrants join . Wiki User. The Jewish, Hungarian, Italian, Irish and other immigrants arriving in early 1850s America came to a country where both major political parties, the Whigs and the Democrats, were dominated by leaders who openly proclaimed the innate superiority of the white man above all others, and who defended the legality, and even the sanctity, of slavery. Since 1987 Rosemary Reed has built Double R into a creative, value-added communications and television/video production firm.Double R serves satisfied clients ranging from major national agencies and Fortune 500 companies to government, local arts and non-profit organizations. Irish immigration to the US was hardly a new phenomenon, though. Did Irish immigrants tend to join the republican party? - Answers Part of the reason for the opposition was religious. Continuity and Change: The Irish Role in American Politics The party offered them social service and jobs. All of the Irish and many of the Germans were Roman Catholic.