The left functionality doesn't exist in this country. We stamped them out in the Cold War and replaced them with the new Democrats who were all for social progressivism but economically were beholden to corporate interests. Then you have the conservatives who are so socially regressive they think Sharia Law is a roadmap and are so in bed with corporate interests that they'd be fine if kids died in coal mines as long as someone at the top is getting paid.

We can't have the true left back until we get voting reform. Ranked choice or approval voting is essential to allow 3rd parties to have a chance to flourish without causing a spoiler effect. That will also pull the Overton window back to the left again as the two major political parties will have less of an incentive to court extremists and will see better results at the polls if their platforms appeal to as many people as possible.