We knew what she would wear. The white pantsuit was waiting for Kamala Harris to take the stage in Wilmington on Saturday night as the United States’ first female vice president elect. Alexandria Ocasio-Cortez wore a white pantsuit when she was sworn into Congress in 2019; Hillary Clinton wore one when she accepted the Democratic nomination in 2016; Geraldine Ferraro wore a white suit when she joined Walter Mondale as his running mate in 1984; Shirley Chisholm wore white when she became the first Black woman to be elected to Congress, in 1968. The Democratic women in Congress dressed in white as a protest at Trump’s State of the Union addresses in 2019 and 2020. The tradition is usually traced to the suffragettes, in particular the 1908 Women’s Sunday march to Hyde Park, whose organisers urged women to dress in white to convey the high-minded purity of their intentions. But earlier than that, all-white clothing had been adopted as a political statement by the feminist, socialist, trade unionist and anticolonial activist Annie Besant.