The Nevada Republican primaries and caucuses: a guide to understanding why there will be two races in the same state. They will take place on two different dates, two days apart, and voters registered as Republicans will be able to participate in both.

For what is this? We explain it. The state Republican Party announced Jan. 9 as the deadline for voters to change their registration to Republican so they can participate in caucuses. Anyone who changes their party affiliation after that date will not be eligible to vote in the caucuses.