it's the money, they really all serve one master. You can track the polarity pretty much when political bribery started being legal.
To some extent and Manchin and Sinema are a good proof of your point but by and large you’ll find what George Carlin said to be true, democrats are for people and republicans are about property. Corporations are people or universal healthcare…
Republican leaders follow the will of their base; which operates from incompetence and greed. Jan. 6 is a perfect example of their mass incompetence.
You allegedly want more voices because the two party system allegedly does not provide sufficient diversity of views. Yet, you and your ilk become apoplectic if anyone in your party deviates from the party script by more than the width of a pubic hair. You might take that for reflection a little.