Elections?

 There is no particular reason we only have two parties in this country except for the collusion by the two of them to assure it.  In pretty much every state, you see policies and practices that support a two-party system and make it hard fora third party to have any real influence.

Realistically we could have a Progressive Party, a Liberal Party, a Conservative Party, an Evangelical Party and probably a few others.  Would that be better?  Depends.  

In countries with parliamentary systems, you have alliances between parties. Generally, one party wins a plurality and makes deals to create a government.  So if you only issue is abortion restrictions, you negotiate tradeoffs with the parties that will support your issue.  In return you support the main agenda.

Currently we see similar maneuvers in our two parties but it extends down to the primary level where most voters are faced with less choice.  In fact the big issue in today's politics is often the primary since so many districts are engineered to assure one of the parties will win it. After taht the actual election is not in doubt frequently..