The Democratic Party more or less ignores the west in presidential campaigns. The reason is the Electoral College system. Nevada was the only state in the west where the margin of victory was less than 3 percentage points in 2016. The entire rest of the west is taken for granted by both parties. 

Every legislator in every western state should favor the use of the national popular vote to pick the president. By this reform, all voters in all western states would get attention, and all their state legislators too would be important to presidential candidates.