Historical clue formulations

• The Dairy State: Abbr. — 2017-08-14
• Cheesehead's state: Abbr. — 2011-12-28
• Birthplace of the Rep. Party — 2011-09-04
• State north of Ill. — 2010-01-11
• Superior setting: Abbr. — 2009-07-25
• Appleton locale: Abbr. — 2000-07-16
• Madison's home: Abbr. — 1996-07-25