Wis. Const. art. II, § 2

The propositions contained in the act of congress are hereby accepted, ratified and confirmed, and shall remain irrevocable without the consent of the United States; and it is hereby ordained that this state shall never interfere with the primary disposal of the soil within the same by the United States, nor with any regulations congress may find necessary for securing the title in such soil to bona fide purchasers thereof; and in no case shall nonresident proprietors be taxed higher than residents. Provided, that nothing in this constitution, or in the act of congress aforesaid, shall in any manner prejudice or affect the right of the state of Wisconsin to 500,000 acres of land granted to said state, and to be hereafter selected and located by and under the act of congress entitled “An act to appropriate the proceeds of the sales of the public lands, and grant pre-emption rights,” approved September fourth, one thousand eight hundred and forty-one.