I don't think that legal argument is accurate, but hey, I'm not a lawyer and neither are you.
It was 'accurate' until the 1930s when a certain lawyer with initials FDR found his programs unconstitutional, so he threatened to pack the Supreme Court until they were willing to shit can the 10th amendment.
alt Hacker News
It was 'accurate' until the 1930s when a certain lawyer with initials FDR found his programs unconstitutional, so he threatened to pack the Supreme Court until they were willing to shit can the 10th amendment.