How Nevada's split primaries and caucuses have undercut the influence of the state's Republicans

LAS VEGAS (AP) — The presidential primary campaign heads west to Nevada this week, where dueling caucuses and primaries are creating confusion among voters but little uncertainty about the expected results.

Nikki Haley will run in Tuesday's Republican primary, which won't count for the GOP nomination, while Donald Trump is the only major candidate in Thursday's Republican caucuses, which does. The split races have undercut the influence of the third state on the GOP calendar.

They also have been a source of confusion and frustration for voters, said Cari-Ann Burgess, the interim registrar of v...