A U.S. federal government shutdown can represent a minor inconvenience, a delay in paychecks, or – for people living in some of the most difficult circumstances – an extended period of hunger and anxiety.

A study published recently in the journal Nutrients provides a unique glimpse into the shutdown experiences of participants in CalFresh – California's name for the federally funded Supplemental Nutrition Assistance Program (formerly known as food stamps). Currently, about 42 million people participate in SNAP across the U.S.

In focus groups conducted in 2019 with 26...