Speaking as an American Anglo- and Scots-Irish, I think it would be very difficult for several reasons.
First of all, the US's large Scots-Irish population mostly came to America before independence, and for that reason don't feel as strong a loyalty to Britain as later immigrants might towards their respective 'old countries'.
This is a very important point. The Scotch-Irish have been in the U.S. for so long that the majority of them don't even realize they're an "ethnic group".
When I first read the title of this thread, I thought it was about making more Scots-Irish Loyalists in during the ARW.