Volunteers will be at the SAC and Union South to help you register to vote in Wisconsin, or provide information on registering and voting by mail using your home address in other states. To register in Wisconsin, bring your WI driver license number. If you have not been issued one, bring the last four digits of your SSN. The Supreme Court primary is Feb. 18. The Wisconsin presidential primary is April 7. Cosponsored by the Associated Students of Madison & the League of Women Voters of Dane County.