In "South Dakota v. Dole" (1987), the Supreme Court upheld the withholding of some federal highway funds to South Dakota, because beer with an alcohol content below a specified percentage could be lawfully sold to adults under the age of 21 within the state. In a 7–2 majority opinion by Chief Justice Rehnquist, the Court held that the offer of benefits is not coercion that inappropriately invades state sovereignty. The Twenty-first Amendment could not constitute an "independent constitutional bar" to the spending power granted to Congress under Article I, section 8, clause 1 of the Constitution. Justice Brennan, author of the majority opinion in "Craig v. Boren", provided a brief but notable dissent based solely on Section 2. Justice O'Connor also dissented, arguing that "the regulation of the age of the purchasers of liquor, just as the regulation of the price at which liquor may be sold, falls squarely within the scope of those powers reserved to the States by the Twenty-first Amendment."