[1010RD]

This is a sovereign state acting v. “Robert W. Stewart, Jr., a convicted felon”

[Ken H]

How is this different from US v. Stewart?

This is a sovereign state acting v. “Robert W. Stewart, Jr., a convicted felon”

That shouldn't matter. If Congress's power under the Commerce Clause extends to outlawing homemade machine guns for individuals, it also extends to state laws governing such matters because of the Supremacy Clause.