trifecta

(US, Australia, New Zealand) A bet in which the bettor must select the first three placegetters of a race in the order in which they finish.

(US, Australia, New Zealand) The attainment of three important achievements, qualities, etc.

(US, Australia, New Zealand, by extension) A set of three related things, often things that cause problems.

(US politics) The complete legislative and executive control of state or federal government by one party: governorship, the upper house, and the lower house of state or federal legislatures. The party that holds all three positions of power is said to have a trifecta.