"Analysts and citizens alike struggle to comprehend recent gyrations in U.S. politics. The country did an apparent U-turn in just eight short years, from the election of Barack Obama and an all-Democratic Congress in 2008 to the election of Donald Trump and confirmation of GOP control of Congress in 2016. Twice in under a decade, ordinary citizens reacted by organizing local grassroots groups all over the country - with Tea Parties starting in 2009...