Faulty illustration. The bible is not set up as a math book.
The US Constitution is set up to establish the details of our government.
Political parties aren’t government. They’re political parties. Why would the Constitution say anything about it?
The Constitution describes ... our Federal structure of Government, and its powers, yes, but not all aspects of how politics works.
2 parties is a logical consequence of first-past-the-post elections and a country divided between govt givers and govt takers. It’s that simple.
3rd parties are extremely ineffective at influencing political outcomes. They dont work, period.