Politics is Downstream from Culture is Downstream from Elites
Politics is downstream from culture because humans are mimetic. They copy people they admire and act like them, adopt their traits and ideologies. After watching TV and movies, you learn how to act like the characters you like.
In a sane world, Sam Hyde would be on SNL performing his Million Dollar Extreme skits to millions of people around the world. By doing so, he would be giving them permission to say and do the same things: to be right wing, based, and offensive and not give a fuck about SJWs.
Normies and NPCs don't have the gumption to do that on their own--to blaze a trail and form their own identity--they need to see someone funny like Sam Hyde, and then memetically act like him with their friends. This is how culture changes: it trickles down from the elites.
People argue back and forth whether culture is downstream from politics or politics is downstream from culture. But it is a bit of both--they influence each other. Really, culture and politics are downstream from elites.
Elites are the individuals who rise to the top of their fields, be it politics, business, art, comedy, music, movies, or sports. Normies look up to those elites, and through memesis, want what they have. So they act like them, adopt their worldviews, tastes, and mannerisms, and literally mimic the things they say and do--because they want to be like them.
Sam Hyde is a comedy elite. So to have someone like him with a TV show on a platform like Adult Swim was huge in shifting the culture--which was why the leftist gatekeepers had to cancel his show before he could gain a larger audience.
Donald Trump is also an elite. He was an elite in business, then entertainment, and now politics. He changed culture with his shows like The Apprentice, and now he's changing politics through his presidency. Trump acts as a model for normies to act like Trump.
Elon Musk is another elite shifting the culture in Silicon Valley. By him becoming anti-woke, it gives permission to many other CEOs, VCs, and tech bros to do the same.
It's not a matter of which is more important, which influences which, politics or culture. They are both downstream from elites.
Elites influence culture and politics through memesis. Normies want to act like the elite figures at the top of their domains.