This is a romantic pipe dream. If there is the potential for a third party, it would be Trump’s xenophobic following. The Democrats and better angel part of the Republicans would fragment leaving the country in the hands of right wing authoritarians. This is exactly what America’s attackers of government have been aiming for for 30 years, and with Trump in the White House they came close, but he is way, too, mentally flawed to pull off a complete takeover, but his following urged on by the Fox ilk will remain a potent danger for many years to come.