In the main, there are two parties in the United States, and the American people are not invited to either of them.
The Republicans do not hide their belief that corporate interests are paramount. So, too, the present Supreme Court as evidenced by their recent ruling that private property rights are subordinate to corporate interests.
The Democrats mouth their disdain of Republican (corporate) views but most often vote the opposite (Iraq war, NAFTA, Patriot Act, No Child Left Behind, suspending habeas corpus, etc.).
I am reminded of the disillusioned voter, who, when asked, “Are you a Republican or a Democrat?” answered, “I am.”