You're a member of the republican party you go to vote for the party nominee for president. on your ballot are candidates for both the democratic and republican nominations. youre most likely in what kind of election

I most likely live in a democratic two-party and two-session election. This means that other candidates from each party were already taken out of the equation for a nomination due to low votes, with other parties again not having enough support to appear on the voting ballot. This means that the only candidates that appear in the second session are the republican and the democratic candidate.