Careful! that's exactly the scenario I joined AH to promote!
The contempt was withering.
It was very much a long shot; the thread was a challenge to come up with a US colony in Europe before 1914, presumably so the USA would be drawn into WWI from the get-go. People seemed to be liking Heligoland when I last looked into that thread!
But yeah, the US had a special interest in Ireland around 1900. Not an unambiguous one, and it's just about impossible to imagine a scenario where the British would prefer it come under Yankee protection (I suggested, as a Commonwealth like Puerto Rico is today); if the revolutionary situation on the island got so bad they had to admit they couldn't hold the place they'd probably much prefer the current situation, with it a fully independent country (kingdom, republic, whatever, from the British point of view).