Oh, god I hope not. It would cease to be America. We are a constitutional republic. Everything about socialism and a social democracy disagree with the founding principles of the US.
Not now, it could happen sometime way way down the road, but if it does, I have a feeling there might be another historic civil war or something like that. Unless there are a solid majority of Americans that want a social democracy then there will be a fight.
When poor white people recognize that plutocratic economics hurt them just as much as they hurt poor black people, they will vote like poor black people. Social democracy has plenty of roles for middle-class professionals in government, and because it enhances the incomes for poor people it creates more opportunities for small business. More businesses fail due to a lack of paying customers than due to tax increases.
Social democracy is fully compatible with a vibrant political life and with democratic constitutions. The American Constitution does not enshrine the entrenchment of wealth and power as objectives. If anything, such entrenchment enforceable in law would require further amendments that would likely destroy many of the freedoms that we now have.