On the first day of the 104th Congress, the House of Representatives adopted a rule that requires a three-fifths majority of those voting to pass an increase in income tax rates.' This three-fifths rule had been publicized during the 1994 congressional elections as part of the House Republicans' Contract with America.2 In a recent Open Letter to Congressman Gingrich, seventeen well-known law professors assert that the rule is unconstitutional. They argue that requiring a legislative supermajority to enact bills conflicts with the intent of the Framers. They also contend that the rule conflicts with the Constitution's text, because they believe that the Constitution's specific supermajority requirements, such as the requirement for approval of treaties, indicate that simple majority voting is required for the passage of ordinary legislation.4