Presumptive Democratic nominee and US vice-president Kamala Harris has Irish roots but not in a way that she is likely to embrace. Ms Harris is the daughter of Donald J Harris, who was born in Jamaica, and Shyamala Gopalan Harris from India. Genealogical research carried out by Northern Irish historian Stephen McCracken reveals Ms Harris’s four-times-paternal-great-grandfather Hamilton Brown was born in Co Antrim in 1776, the year of the US Declaration of Independence. Brown emigrated to Jamaica, then a British colony, and became an enthusiastic slave owner on the sugar plantations that were the mainstay of the island’s economy. He...