Ms. Smarsh was describing the isolation she felt growing up poor in rural Kansas. Her mother was 17 when Sarah was born. There was no Family and Medical Leave Act, no help from the Violence Against Women Act, and long miles to travel to get to medical care.

The uninsured rate for low-income adults has decreased in the last several years across America, thanks in large part to the Affordable Care Act. But small towns and rural areas of states that have expanded Medicaid have seen the sharpest decline in uninsured rates. That’s one of the findings of a new report from the Georgetown University Center for Children and Families and the University of North Carolina Rural Health Research Program.

Below, we share just a few of the many, many emails we received from MomsRising/MamásconPoder supporters today who participated in our nationwide action to deliver letters and baby toys or blankets to local Wells Fargo and Chase bank branches. The letters express outrage that these banks are...