Mail ballots dropped off on election day.
Arizona also has some "box 3" election day votes that had to be dropped because of a machine tabulation issue.
Kelly's lead is so massive at this point that Masters would need to win these by very large margins to win. So Wasserman called this race.
In Nevada, Dems believe their union voters dropped off a lot of late earlies. Typically we expect late earlies to skew more Republican than the pre-election day early mail ballots, but if this is not the case then Cortez-Masto's race could be callable tonight. Based on party registration data for the Clark batch for tonight this may be the case. Otherwise we will have to see tomorrow's batch. Cortez-Masto is the favorite.
Both governor's races are very tight. We may not know Nevada's governor's race till next week.