Possible Clues:

• Oshkosh's state (Abbr.)
• Neighbor of Minn. and Ill
• State n. of Illinois
• Tammy Baldwin's state: Abbr
• 35 Across' birthplace
• Chippewa R. setting
• Walker recall st
• Badger St
• Cheesehead's state: Abbr
• Cheesehead's st.