Are you sure? From what I can find, pretty much every state has a different license to pull a trailer over 10,000lbs. Makes no difference to me, just don't want people getting in trouble.
Wisconsin
Driver龍 licenses are separated into the following classes:
class A: Commercial license permits the operation of any combination of vehicles with a Gross Vehicle Weight (GVW) rating of over 26,000 lbs. if the GVW rating of the vehicle or vehicles being towed is in excess of 10,000 lbs.
class B: Commercial license permits the operation of any single vehicle with a GVW rating of over 26,000 lbs. and any such vehicle towing a vehicle or vehicles with an aggregate GVW rating of 10,000 lbs.
class C: Commercial license permits the operation of any single vehicle with a GVW rating of 26,000 lbs. or less, including any such vehicle towing a vehicle with a GVW rating of less than 10,000 lbs. if the vehicle is designed to transport more than 16 passengers or the vehicle is transporting hazardous materials.
class D: Permits operation of any motor vehicle not included in Class A, B, C, or M.
class M Permits operation of a motorcycle.