Whether California may punish a person for knowingly transporting an indigent nonresident into the State.
Holding
No. Section 2615 imposed an unconstitutional burden on interstate commerce and therefore could not support Edwards's conviction.
Reasoning
The Court accepted California's proposed narrow construction of “indigent person”: a person presently destitute, lacking resources for life's necessities, and without relatives or friends able and willing to support him. Even under that limited reading, the statute directly prohibited bringing a defined class of people across the California border.
Transportation of persons from one State to another is interstate commerce, whether or not the transportation is commercial in character. Although States retain substantial police power over local matters that may incidentally affect commerce, California's law did not merely regulate a local condition. Its intended and immediate operation was to bar the interstate transportation of indigent persons.
California's concerns about migration, public welfare, health, morals, and fiscal burdens were serious, and the Court did not question the wisdom or urgency of the State's efforts to address them. But a State may not isolate itself from problems shared by the nation by shutting its borders to persons whom it regards as economically burdensome.
Interstate migration is a subject requiring national rather than piecemeal state regulation. If one State could exclude indigent newcomers, other States could retaliate, creating cumulative barriers to travel. Migrants and those assisting them could not realistically navigate varying state admission rules, and the affected nonresidents would lack political power within the States excluding them.
The Court also noted that relief for needy persons had become a national as well as local concern. Federal and state governments jointly funded many forms of assistance, and Duncan himself had received federal assistance in both Texas and California. This development underscored why one State could not treat the migration of needy people as a problem it could solve alone.