One provision of the Articles of Confederation stated that an amendment to the Articles could only be made with the approval of all the states, and this gave any state a functional veto power over amendments. Other states opposed amendments that might harm their own interests, but Rhode Island was particularly ready to use its veto power. The Confederation Congress called a convention to discuss amendments that would address this and other perceived shortcomings in the Articles, to be convened in Philadelphia in May 1787. But Rhode Island refused to send a delegation, and the convention instead set about drafting a new Constitution. Rhode Island was the only state that did not participate in its proceedings.