What are some Irish contributions to the US?

Irish immigrants have made significant contributions to the United States in various fields, including politics, culture, and labor. They played a crucial role in building the nation's infrastructure, particularly during the 19th century, by working on railroads and in construction. Culturally, the Irish have enriched American music, literature, and celebrations, most notably through St. Patrick's Day. Prominent figures of Irish descent, such as presidents John F. Kennedy and Ronald Reagan, have also shaped American political history.