Minor nitpick: in the US, it’s two of the big parties, and a few of the small parties (so not 2-3 total). Last time (2016), there was the Libertarian Party and the Green Party on the ballot.
Yeah, but it's usually merely 2 parties that have any chances at all, by the way the voting system is setup, and how the whole game is played (for one, ruling parties having the money to advertise and secure their positions and playing with advantage beyond their program over any new party)
