Who is on the ballot in each contest?
Ms. Haley chose to appear on the primary ballot, and she is the only major Republican candidate left in the race who will be on it. “None of These Candidates” will be an option.
Mr. Trump elected to participate in the caucus, and he is the only major candidate left in that contest. So while Ms. Haley is expected to win the primary, Mr. Trump is all but guaranteed to take the caucuses, earning 26 delegates along the way. No matter the outcome in either contest, Ms. Haley will not earn any.
Critics of the split primary-caucus system have said it was designed to benefit Mr. Trump, who has close ties with the Nevada Republican Party. Prominent political analysts and Mr. Trump’s rivals alike have suggested the process was “rigged” for the former president.
Still, Ms. Haley could have chosen to fight Mr. Trump for delegates by appearing on the caucus ballot, and the state party has denied that it set up the caucus to benefit him.
What about Democrats?
The Nevada Democratic Party will hold one election, a primary, on the same day as the Nevada Republicans, Feb. 6. President Biden will appear on the ballot, as will the self-help author Marianne Williamson. Representative Dean Phillips of Minnesota, another of Mr. Biden’s long-shot challengers, chose not to compete in Nevada.
Nevada has a closed primary system — Democrats can vote only in Democratic elections, and Republicans can vote only in Republican ones. Independent or nonpartisan voters cannot vote in either primary unless they choose a party affiliation during early voting or on the day of the election. In order to participate in the Republican caucus, voters needed to have registered as Republicans in Nevada by Jan. 9.