All ratified the Constitution as it stood, and that included the procedures for adding new states to the Union.
Where it it written that they must remain in the union?
Where are those quotes from?
True. But of the 1st 13, No state could have refused to accept the ratifications - thre was no congress under the new government. And the Constitution is SILENT on the process of leaving, and whether or not it requires consent.
My bad. 'An Act Authorizing the submission of the constitutions of Virginia, Mississippi, and Texas to a vote of the people, and authorizing the election of State officers, provided by the said constitutions, and members of Congress.' HR 405, passed by the House 6 Apr 1869, the Senate 9 Apr 1869.
On 9 Apr 1869, the Senate added the following clause proposed by Senator Morton:
And be it further enacted, That, before the States of Virginia, Mississippi, and Texas shall be admitted to representation in Congress, their several legislatures, which may be hereafter lawfully organized, shall ratify the fifteenth article which has been proposed by Congress to the several States as an amendment to the Constitution of the United States,The bill passed by a vote of 44-9. Where does the Constitution grant the federal government the power to FORCE a state to ratify an amendment?