"Following the colonial migrations, the United States enjoyed the greatest influx of Irish during the 1840s as Ireland suffered the Great Famine," he said. "Hungry but hopeful, poor but perseverant, Irish-Americans seized the opportunity to work hard, enjoy success, and pursue the American Dream. 'Leaders' "Many took on the difficult work of constructing America's infrastructure. Others assumed positions of leadership. "Among those leaders were signers of the Declaration of Independence and Presidents of the United States. Still others enjoyed great success and influence in the arts and literature. "From social activists to business leaders, athletes to clergy, and first responders...