[Chlorus]

"There is not a major political party in the US that advocates for an employment guarantee, banning private property, or withdrawing all armed forces from around the world. These are positions you would expect from a range of left parties in a parliamentary system."

That's a pretty loose definition of 'major'.

Parliamentary systems sound pretty shitty then - keep in mind the Golden Dawn, UKIP, and any one of the perennial "let's deport all the Roma" parties also counts as a major political party under your definition.