The odds might be low, but they are substantially larger than zero. Most people I know are preparing in some way by offshoring what money they have, researching places of refuge, etc.

The path to violence is: * imposition of punitive tariffs by Trump * Retaliation which escalates to energy export tariffs. * At some point Canada shuts off electricity transfer to the US and restricts water transfer, which shuts down the eastern seaboard. Trump declares this an act of war.