This was Hillary, but it is a central bragging point of the Left. The states (or counties) that the Dems win (in a losing election) account for 2/3rds of the GDP of the US.
"I won the places that represent two-thirds of America's gross domestic product,” Clinton said. “So I won the places that are optimistic, diverse, dynamic, moving forward. And his whole campaign, 'Make America Great Again,' was looking backwards."
Let's take that at face value. People who are "optimistic, diverse, dynamic, moving forward, produce more. People who are looking backward, stuck in their old ways, refusing to move forward or adjust to new circumstances - produce less and earn less.
But income inequality, worst in Dem areas and states, is the (pretend) economic enemy of the Democrats. Everyone should make the same, or make closer to the same, whether you work, study or smoke crack.
Actually income inequality is the fact of life that Democrats can always use to say their redistributionist efforts are still needed. People are not the same and will never will all be worth the same. They can only have equal outcomes under a totalitarian coercive government apparatus.
People such as in Democratic Silicon Valley who know how to invent, innovate, raise venture capital, start companies, build companies finance companies, hire people, and take those companies public and win global market share make more money than people who don't - because they add more value. People with a specific education and training who open blocked arteries make more money that people who open blocked kitchen drains, even if the time for the procedure is the same. People who put more money and time into the right kind of education and training make more money than people who don't.
But making more money because you deserve to is the OPPOSITE of Leftist rhetoric. They compare the 4th and 5th quintiles of income with the first or second groups and say this is wrong and unfair, even if they are pointing to the same person at different points in their life.