Rudyard Kipling, 1895, via Wikimedia
Kipling was an Imperialist and white supremacist, and he admired Canada for setting its own tariffs. After a long trade war with the USA (One that was amped up by hefty tariffs imposed on Canadian goods by Trump idol President William McKinley) the 1897 National Policy gave reduced tariffs to UK imports.
The poem repeats "Daughter am I in my mother’s house,/ But mistress in my own." and follows with "Soberly under the White Man’s law/My white men go their ways."