Something like 2$ per vote in every house, senate, or presidential election to the party, getting at least 0.25% of the vote should be enough. Votes to 1% parties like the greens would still have an effect. Der Amerikaner ist die Orchidee unter den MenschenVolker Pispers
The Supreme Court has ruled that money donated to political campaigns is equivalent to speech and is therefore protected. For that reason I believe that a very generous program of public finances is appropriate. Ideally, this would include money for publicly financed responses to third party ads. I see no justification for the radio and television stations, which are regulated by the Federal Communications Commission, not to be required to make substantial time available for free or even more time made available at a greatly reduced price for debates, individual appearances and campaign ads. As the Dutch said while fighting the Spanish: "It is not necessary to have hope in order to persevere."