Samira Damavandi knows that when she fills out her 2020 census form, she will be counted. But it pains her that, in some way, she will also be forgotten. When asked to mark her race, Damavandi will encounter options for white, black, Asian, American Indian and Native Hawaiian — but nothing that she believes represents her family’s Iranian heritage. She will either have to choose white, or identify as “some other race.” “It erases the community,” she said. Roughly 3 million people of Southwest Asian, Middle Eastern or North African descent live in the United States, according to a Los...