Sure you can, happened many times in history. US independence, French Revolution, suffrage movement, civil rights movement. Elect radicals

These were none via election, this was done through mass popular struggle.

People that want to get rid of billionaires, corporations in politics and people getting fairly represented are the minority. The majority want a wall on the border with Mexico, arming teachers or abortion rights and lgbtq rights etc. That’s what they care about. Highly controversial topics that ultimately change nothing about how the show is run.

You'd be surprised, but even then trends are changing as Capitalism declines and dies.