Bernie Sanders launches tour "to fight oligarchy": Here's where he's going

https://lemmy.world/post/25620212

Bernie Sanders launches tour "to fight oligarchy": Here's where he's going - Lemmy.World

Summary Bernie Sanders announced a national tour to challenge billionaire influence in politics, specifically targeting Elon Musk’s growing role in Trump’s administration. Sanders, 83, quipped that he’s “not in the habit of thanking Elon Musk” but acknowledged Musk has exemplified how billionaires dominate politics, media, and the economy. Sanders also highlighted wealth inequality, noting Musk, Zuckerberg, and Bezos hold more wealth than half of Americans. His tour begins February 21 in Nebraska.

I think the only way the Democrat party meets the current moment is if an AOC or Bernie or similar wins the next presidential primary and aggressively replaces the current leadership.
So, in the USA, the current presidential candidate of a party is also automatically the head of the party? How do they expect any human to fulfill both roles competently at once?