Before Tuesday, vice presidential contender Tim Walz was hardly a household name. Now that the Minnesota governor has been the subject of round-the-clock news interviews and viral videos, he has also picked up a new nickname. Enter “Tampon Tim,” conservatives’ response to the 2024 state law Walz signed that requires public schools to provide menstrual products in student bathrooms.It hardly feels like much of a “gotcha” moniker, though. Periods have been a mainstream public policy priority for the better part of the last decade. And California has been at the forefront. Since 2017, the Legislature has passed a series of...