The problem is US has no health care for all. Minimum wage, especially as compared to average or the standard of poverty is very low in the US, the immigration stance of even the "far left" would definitely count as anti-immigration in Europe (yes, I know, despite the numbers favoring the US, and the US being ethnically far more diverse than Europe), US has the death sentence, and now the abortion stance ...

All of those are things that even the far right in Europe wouldn't dare suggest, yet the leftmost party in the US stands behind them, or is at least willing to accept them.