Donald Trump is a US president with a uniquely strong connection to Scotland. His mother, Mary Anne MacLeod, was born and brought up on the Hebridean island of Lewis but emigrated to New York to live a very different life. Mary Anne was one of tens of thousands of Scots who travelled to the US and Canada in the early years of the last century looking to escape economic hardship at home. She first left Lewis for New York in 1930, at the age of 18, to seek work as a domestic servant. Six years later she was married to...