I think you're not understanding that Trump's people who are the middle class and the poor are just wanting for the same lift up out of poverty as Biden's people of the same financial positions.
That's one thing that the Trump rightwing and Bernie leftwing populists all have in common, they're tired of the corruption of the Washington elites.
America's poverty is hidden from the world's view but it can be seen clearly with a bit of research. It's a bastardization of capitalism that differs from our Canadian values as well as the values of the rest of the world's capitalist systems.
Unfortunately a lot of Americans, especially Republican supporters, value "freedom" over better economic and social conditions, which is why things like healthcare reform is so hard.