Also there is currently no left wing in the US. What's often called left by the right is people who disagree with them.
What we actually have is a supermajority who believe in typical US values like publicly funded education, providing modest social safety nets and one person one vote. A small minority on the far-right leaning towards secession. And a small minority on the left so disenfranchised that their well-meaning causes like unionization and protecting the environment are portrayed as little more than punchlines on the evening news.
Which brings up the importance of media in political discourse. In journalism, one always punches up, doing investigative reporting on politicians, religious leaders, titans of industry, etc. Propaganda punches down at immigrants, the poor, the less fortunate.
Which means that we also don't have news in the US, just infotainment that endlessly distracts and denies. A handful of outlets like FSTV and Public Television try to get at the truth, but have such small viewerships that they're tolerated so the big players have something to point to as alternative. Which is by design, to suppress any left-leaning sentiment among voters.
Edit: video by Matthew Cooke supporting my claim: https://m.youtube.com/watch?v=JiEdui05BeY