 In 1970, however, in "Oregon v. Mitchell", the Court held that Congress had exceeded its power by attempting to require the states to reduce the voting age to 18.This led to adoption of the Twenty-Sixth Amendment to the Constitution in 1971, which provided that the states could not set a minimum voting age higher than 18.In the 1997 case of "City of Boerne v. Flores", the Court again took a narrow view of the Congressional power of enforcement, striking down a provision of the Religious Freedom Restoration Act (RFRA) that sought to forbid the states from placing burdens on religious practice in the absence of a compelling state interest in doing so.