Oregon ranks #21 in MHI according to this site at $62,800
https://www.careerinfonet.org/rank_median_income.asp?printer=true&soccode=&stfips=47&id=&nodeid=12
Oregon ranks #27 in MHI using the Statistical Atlas numbers at $53.3k:
https://statisticalatlas.com/United-States/Household-Income#figure/state
It looks like the chart you presented adjusts MHI based upon the Cost of Living...
If so that is surely more a factor with the lack of affordable housing in many parts of the state, which quite frankly has very little to do with the Democratic Government in the state and much more to do with banks and building companies priorities, and quite possibly the reality that since the Great Recession there has been very little investment nationally in building new affordable housing.
One could make a strong argument that the high rates of homelessness are also closely correlated with the lack of affordable housing, and again very little to do with the Democratic Gvt in Salem.
The issue is extremely strict zoning laws and democrats inability to ever consider housing supply when crafting housing policy .
House Bill 2001 is, like, completely game-changing, a dramatic expansion of supply-based housing reform, and should be a model for the rest of the country, and was championed by progressive Oregon Democrats.