This idea may catch on, here's a website encouraging such a duel:
Tell Ducking Donald to Debate Ted Cruz.
America is in the midst of a raging cultural and spiritual war. Forces of Good, Light, Conservatism and a Judeo-Christian Worldview daily battle the forces of Evil, Darkness, Socialism, False Religions and Philosophies. A Good Choice is on the frontlines exposing evil across America’s political and social spectrum.