This one has the advantage of being live and current. The Progressive-Democratic Party has extended its control over the State of California.  The results accumulating from the several years of Progressive-Democratic dominance (now outright control) are these.  California has

• the highest welfare numbers (a third of all Americans on welfare live in California)
• the largest contingent of illegal immigrants
• a burgeoning homeless population
• onerous regulations on business and private property
• mediocre public schools
• high income taxes (the highest marginal rate is 13.3%) and sales taxes
• a yawning gap between rich and poor
• its own summer blend of expensive gasoline
• bedraggled and crowded roads
• a widely mocked high-speed rail boondoggle

Sadly, it doesn’t get any better than that for California.  Or for our United States if the Progressive-Democratic Party makes further gains in 2020 or beyond.