U.S. v. Williams
Adam Williams was convicted in Indiana for distribution of narcotics and possession of a firearm as a felon in 2008. He chose to appeal his conviction to the 7th Circuit on several points, one of which was the constitutionality of § 922(g)(1). The section in question bars convicted felons from owning firearms.
The Court's opinion is here [pdf]. Williams based his appeal in part on the Skoien decision, which has since been remanded. The Court considered the applicability of that case in the current proceedings and found it wanting:
And although we recognize that § 922(g)(1) may be subject to an overbreadth challenge at some point because of its disqualification of all felons, including those who are non-violent, that is not the case for Williams. Even if the government may face a difficult burden of proving § 922(g)(1)’s “strong showing” in future cases, it certainly satisfies its burden in this case, where Williams challenges § 922(g)(1) as it was applied to him. Williams, as a violent felon, is not the ideal candidate to challenge the constitutionality of § 922(g)(1). [p. 16]
Skoien considered the question of a misdemeanant, not a felon. Furthermore, there is a big difference between a felony conviction for writing a few bad checks and one for violence. Under the Skoien doctrine of "intermediate" scrutiny (and perhaps even strict scrutiny), the court finds that a ban on firearms possession by violent felons passes muster. Part of me agrees.

