Why doesn't one party or the other - or both - ask all registered voters of that party, individually, to find someone of the other party and just talk with them. Try to understand their view. And then figure out how to collect all of that publicly so we all can better understand what is happening around us. Assign people, give them free choice, allow overlap. Just try to cover everyone and at least try to talk one-on-one with no pressure to succeed but every hope of success in doing so - again, understanding, not persuasion.