Ralph E. Smalley, 62, was injured in a single-vehicle rollover on County Road D in rural Westby, Wisconsin, on Sunday, April ...

Thirty years after a truck bomb detonated outside a federal building in the nation’s heartland, deep scars still remain from the deadliest homegrown attack on U.S. soil.

The lawsuit follows weeks of feuding between the Republican administration and Democratic Gov. Janet Mills that has led to threats to cut off crucial federal funding.