A person who buys and sells horses, especially one who makes such transactions in a clever or skillful manner.(noun)
One who is skillful in transacting or negotiating of any kind.(noun)
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Use "horsetrader" in a sentence
"He was a better campaigner, communicator and horsetrader than anybody in a long, long time."
"After an early career as a Kentucky horsetrader (in more senses than one), Sanders then advanced to leading light of the free-trade-and-invade-Mexico “Young America” movement (it got nowhere)."
"His name was Jonas Alderson, and be looked sufficiently like a horsetrader to be one."