Utah Gov. Spencer Cox told ABC's "This Week" that the suspect, Tyler Robinson, is not cooperating with the FBI, but his romantic partner is.

The Charlie Kirk assassination sparks a new round of calls to dial down the vitriolic rhetoric. But what about President ...

New video appears to show Charlie Kirk murder suspect Tyler Robinson stalking Utah campus hours before shooting: Live updates ...

Presidential historian Tevi Troy explains how social media has transformed public consumption of political violence footage ...