What do Rutherford b Hayes railroad spike and Pittsburgh have in common?

Rutherford B. Hayes, the 19th President of the United States, is historically linked to the development of the railroads during his presidency, which played a crucial role in the expansion of the American economy. Pittsburgh, known as a major industrial hub, was significantly impacted by the growth of the railroad network, facilitating trade and transportation. The "railroad spike" symbolizes the importance of railroads in connecting cities like Pittsburgh to the broader economic landscape during that era. Thus, both Hayes and Pittsburgh are tied together through the transformative power of the railroad industry in American history.