The two majority party system will never change, nor can be changed at this point. The most you can do is focus on who is elected in your district, your state reps are the ones who make the most calls about taxes and jobs relevant to you, and most of the time you can just call them, other than that unless you are extremely wealthy you cant change politics. Back to Romneycare, its extremely similar to Obamacare, Romney instituted a similar plan in Massachusetts at the time and it was very successful, insurance companies had less control, and it made it way more affordable for college students to acquire healthcare plans. Obviously there are still several differences as the scope and cost is on a much larger level with ACA.