“An Éirinneach nó Sassanach tú?”
The Irish national consciousness has long seen itself as oppressed by its English colonizer and despite differences between the types of oppression in other colonies, Ireland will always maintain a history that includes the story of British oppression. Ireland’s politics, from the Act of Union, through de Valera’s economic war, has centred around the Irish-English relationship that had until 1922 been voiced in Westminster.
http://www.victorianweb.org/history/halloran1.html
Big City Irish Mayors
“Blind Boss” Buckley of San Francisco
Edward R. Butler of St. Louis
James Michael Curley of Boston
Richard J. Daley of Chicago
Richard M. Daley of Chicago
William Flinn of Pittsburgh
Roy Vincent Harris of Augusta, Georgia
Robert E. McKisson of Cleveland
Pete McDonough San Francisco
William Tweed of New York City
Ronald Reagan of California
Not familiar with all of these, but Tweed appears to more accurately be classified as Scotch-Irish than Irish.
As you are no doubt aware, many among both groups object loudly to being lumped together.
A list of leading Scotch-Irish Americans would be even longer than that of leading Irish Americans.