horse trading in polytics - other parties buying candidates

 a secrate way of trading to win

https://www.quora.com/What-is-the-meaning-of-the-term-horse-riding-in-politics

when a party poaches members from other parties to form a government

Read more at: https://www.deccanherald.com/elections/karnataka/explained-what-is-horse-trading-1217834.html