No matter the direction of the tragedy, the end result is the same — the right grows angrier at the left, and the left grows angrier at the right.

© Gus Aronson for The New York Times

The round table convenes to make sense of Kirk’s legacy and the future of discourse.

© Illustration by The New York Times; photograph by Jack Taylor/Reuters

An assassin took aim at the American experiment itself.

© Ross D. Franklin/Associated Press