Sandra Day O'Connor

“ Today's opinion is consistent with the longstanding doctrine that the Equal Protection Clause permits economic regulation that distinguishes between groups that are legitimately different—as local institutions so often are—in ways relevant to the proper goals of the State. ”

“ It is not clear to me why completely barring the banks of 44 States from doing business is less discriminatory than Alabama's scheme of taxing the insurance companies from 49 States at a slightly higher rate. Nor is it clear why the Equal Protection Clause should tolerate a regional "home team" when it condemns a state "home team." See id., at 878, 105 S.Ct., at 1682.
The Court emphasizes that here we do not write on a clean slate as the business of banking is "of profound local concern." Ante, at 177. The business of insurance is also of uniquely local concern. Prudential Insurance Co. ”