The Supreme Court, of the corporate United states, decides Paul v. Virginia: Insurance is not interstate commerce, within the definition of Article I, Section 8 [Clause 3]. And is thus subject to regulation by the States, not Congress.
[added 5/2/2022]
Subsequent Events:
Authority:
Article I, Section 8 [Clause 3]
ccc-2point0.com/constitution-for-the-united-states
References:
Paul v. Virginia, 8 Wall. 168 (1868).
en.wikipedia.org/wiki/Paul_v._Virginia