More than 6 in 10 registered voters said they think "extreme political rhetoric" was an important contributor to the killing of conservative activist Charlie Kirk earlier this year — including majorities of Democrats, Republicans and independents, according to the latest NBC News poll.

The findings represent a grim milestone in America's reckoning with growing political violence and its root causes. The survey marks the first time, across questions about five different violent incidents over 15 years of NBC News polling, that there has been cross-partisan agreement that rhetoric played an important role in an attack, as opposed to the incident having been more about the actions of a single disturbed person.