Does Trump Help Fuel Mass Shootings?

How much responsibility does President Trump bear for violence motivated by racism? The columnists discuss gun control, the recent shootings in El Paso, Tex. and Dayton, Ohio and their connections to Trump's dehumanizing statements about immigrants. Then, several 2020 Democrats took shots at Barack Obama’s legacy during last week’s presidential debates. Were they just trying to undermine Joe Biden’s appeal, or does the breakup with the most recent Democratic president signify something deeper? For background reading on this episode, visit nytimes.com/theargument