As the Republican governor of South Carolina in 2015, Nikki Haley stood shoulder to shoulder with political leaders from across the state to call for the removal of the Confederate flag from the statehouse grounds. Days before, an avowed white supremacist who posed with the flag in photographs massacred nine Black parishioners at a church in Charleston. As her state – and the nation – reeled from the heinous act, Haley argued that the flag embraced by many southerners as a symbol of “noble” traditions was for too many others “a deeply offensive symbol of a brutally oppressive past”. It...