Is there evidence of a primary debate influencing whether a primary candidate won a specific state?
Erikson, Robert and Christopher Wlezian.The Timeline of Presidential Elections.
General election debates
Survey results at multiple points in time
~87% of study participants registered no change in preference after general election debates, compared to ~40% after primary debates
"Do Presidential Debates Matter?" University of Missouri, Political Communication Institute
Longitudinal Effects of Violent Video Games on Aggression in Japan and the United States
A two-party system is the outcome of America's founding political structures
A two-party system is the outcome of America's founding political structures and modern obstacles to 3rd parties