There are hardly any left leaning congressmen left. The Overton window has been shoved so far to the right for decades that most Democrats are right of center, neo-liberal corporatists.
Even if you got rid of most of the Democratic Party, there’s only a handful that are not right of center. There is no such thing as a progressive part of the Democratic Party.
The stark reality is that the government has been so corrupted and under funded for so long there isn’t money for big public works projects or to overhaul the medical system or really innovate or build new things because it just going into corporate shareholders pockets.
The American people have been duped and the wealth of the nation has been transferred to Wall Street over the course of the last several decades. The corporations are flush with cash, and the country is falling apart. Since corporations and the wealthy elite don’t pay their fair share taxes, and keep taking all the cookies out of the jar, everybody’s fucked and fighting with each other instead of uniting to get these corrupt assholes out of politics.
The very fact that all these tech bro, billionaires have seized control of the government along with white nationalist crysto-fascist think tanks, like the heritage foundation, shows the weakness of the American style government.