You should have at least included one or more links to prove the authenticity of your topic, but also I think you are wrong, USA is a well developed country that has being a mixed economy right from the past. Joe Biden and Kamala Harris if elected can not just use executive power to change the economy system of United States. They can only make a move and left for the legislative arm of US government to vote and decide which road to take.
If people like, they can vote for either Trump or Bidden, but do not tell false lies as I believe bidden can not make such stupid decision to pass a bill of economy system transformation (socialism) to senates.
Agreed, Bidden ideas are pretty radical, but same applies to Trump. I don't see Trump as next president simply because his actions weren't giving the results most of us expected.
And we witnessed how his wild ideas couldn't make it through the government convocations, neither would make through radical left moves of Bidden.