different between horsedealing vs horsetrader

English

horse +? trader

horsetrader (plural horsetraders)

(literally) A person who buys and sells horses, especially one who makes such transactions in a clever or skillful manner.
(figuratively, by extension) One who is skillful in transacting or negotiating of any kind.
- 1937, "Judiciary: Visibility Poor," Time, 22 Feb.:
  The three subordinates on whom President Roosevelt depends to win his Senate victories are Majority Leader Joseph T. Robinson of Arkansas, the bull-voiced, heavy-fisted field commander; Pat Harrison of Mississippi, the shrewd committee and cloakroom horsetrader; and James F. Byrnes of South Carolina.

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