The answer to this is not to stop third or more party participation. The answer is to require a majority to win an election. Greater than 50%. So that somebody who gets 30 or 40% of the vote against the will of 60% of the people. You keep running the election over and over till somebody gets greater than 50%. Some states already do this.
“Greater than 50%.”
Bravo! You get it. The will of the people and not the baby sitting of the party. And it means the people making their choice. So the only thing that could get in the way is graft. And that starts at the ground level in the states. If they can be controlled, the people will be the deciding factor, with more than what the party puts on the hook. Imagine, no pork , correct budgeting to get close to what is needed and then figure it out, laws on the books the people want and not just the politicians, protection of the borders to prevent crime and overcrowding, education requirements that actually do and are supervised under the parent, not the politicians from 2k miles way with threatening holding the funds... My God the possibilities. Good on ya.
wy69