Nevada has changed over the years. It used to be that you had a fairly liberal Northwest Nevada (Washoe County), a very conservative (but sparsely populated) rural area, and a fairly conservative Southern Nevada (Clark County).
That has all changed, and you have a more moderate Washoe County, and a much more liberal Clark County. And a much bigger population, further diluting the influence of the rural areas.
Is this caused by a lot of refugees from California bringing their lefty politics with them?
Retirees from Kali. Need I say more? Clark County went union (SEIU). Ruined casinos IMO. Then economy went south and really ruined the casinos...the housing market. Methinks some folks coming to their senses and realizing what a disaster Obinomics has been for America.