Kamala Harris has range. She can grill nominees for the Supreme Court or meet with foreign dignitaries, then pivot to hosting a Diwali celebration or dancing enthusiastically alongside an HBCU-styled marching band. It is a dexterity that Harris, the first Black woman and Asian American to serve as vice president, developed as a person of color to navigate the corridors of power or Main Street in a nation where race and identity influence how one is received or embraced. Harris, the daughter of immigrants from Jamaica and India, is an adroit code-switcher, a term that can include deliberately adjusting one’s...