Just remember the weird rules Virginia has for our own well-known candidates to get on their flippin’ ballot, and you’ll see just the tip of the legal-impediment iceberg that has been thrown up in the parties we do have, and that will give an idea how hard it would be to make the nation NURTURE alternative parties rather than MAINTAIN THE POWER of only 2 parties.
You’re talking a state-by-state fight there. About the only card to play would be the “fairness” card since the Republicans and Democrats in power have zero incentive to relax the rules.