According to the President the Civil Rights Movement - that modest attempt to stop lynching, segregation, and legally enforced white supremacy - was actually very hard on white people. Apparently the real victims of Jim Crow were the people doing Jim Crow. read more
Fact is, if you're being honest, Democratic policies all favor corporations and capitalism.
There's nothing policy wise that democrats fight for that could be considered leftist.
There are some very popular policies with voters that democrats could support like national healthcare that they choose not to support.
They won't even consider raising taxes on the rich, too afraid to offend their wealthy donors (owners).