Not all the delegates who attended the convention signed the Constitution. ... Three delegates—Elbridge Gerry of Massachusetts and Edmund Randolph and George Mason of Virginia—were dissatisfied with the final document and refused to ink their signatures. 6. “We the People of the United States” was a late change.
Of the 55 original delegates, only 41 were present on September 17, 1787, to sign the proposed Constitution. Three of those present (George Mason and Edmund Randolph of Virginia and Elbridge Gerry of Massachusetts) refused to sign what they considered a flawed document.