Henry St. Claire and the Narragansett Pacer
I'm one of those crazy Americans who believes the Scotsman Henry St. Clair came to America and that the structure in Narragansett Bay is a Templar Church. I believe it is aligned with the Kennsington Stone that was found in Minnesota thousands of miles away but on a straight line with one of the openings in the 'church'.
But that being said....IF Henry St. Clair came to America..it is very possible that as a knight....he had ponies transported to America with him and that the famous pacer from that region could be decendents of the ponies he MAY have brought with him.
This would make the Icelandic the first horse in America.