With all precincts reporting, "None" led the way with 30 percent of the vote, according to an unofficial tally from the Associated Press. Finishing second was former state economic development director Robert Goodman, who won 25 percent of the vote.
Goodman will be the nominee because state law reads, "Only votes cast for the named candidates shall be counted in determining nomination or election to any statewide office or presidential nominations or the selection of presidential electors."
Sandoval easily won renomination and will be a substantial favorite in the fall.
The "None" option in Nevada dates back to the 1970s. In the wake of the Watergate scandal, the option was offered to counteract apathy about governance and politicians. It survived a court challenge earlier this year.