This should surprise literally nobody. Let me briefly explain the US political landscape.
Classic liberalism is a pollitical and moral philosophy that came about in the last 600+ years that (among other things) enshrined individualism and private property. This evolved hand in hand with enclosures (ie private property) and ultimately led to capitalism as an economic system.
Colloquially, "liberal" is used to describe someobody who is socially progressive, typically a Democrat, but that really has nothing to do with the origins.
Neoliberalism is what liberalism evolved into, primarily in the 20th century. The key principles are that capitalism (the "free market") is the solution to basically all problems and deregulation (to increase profits, basically).
Everybody is a (neo)liberal. Democrats and Republicans both. Note that "leftists" are by definition not neoliberals and are anti-capitalist but people often mistakenly use terms like "liberal" and "leftist" interchangeably when they couldn't be more different.
Imperialism is the highest form of capitalism. Fascism is capitalism in crisis. The Democratic Party as it exists in the US today, is controlled opposition.
So we come to the Overton window. This is how it goes:
1. Republicans pass some legislation like the Patriot Act to take away rights, usually under the guise of "security". The Patriot Act of course was passed in the aftermath of 9/11;
2. Ultimately the Democrats get in office and... don't reverse it. It becomes the new normal. They do this by being institutionalists. But defending institutions is merely an excuse for inaction.
3. Come the next election the Patriot Act or the border wall or whatever will the new normal and some even more fascist legislation will be on the table. As an example, try and find the daylight between the immigration plan of the Kamala Harris 2024 campaign and the Trump 2020 immigration plan (that Democrats opposed at the time).
Nobody cares about our individual rights. Things continue to get worse because both parties will always choose the US imperial project and the profits of corporations over your rights. We are six companies in a trenchcoat.