Video from outside of Donald TrumpDonald TrumpCould Trump self-pardon? the world may never know Ex-Cruz aide: Trump presidency 'is effectively over' Trump Jr.: All I know is Scaramucci wasn't the leaker MORE's rally in Kansas City, Mo., shows at least five police officers using pepper spray against protesters. 

Trump has been under fire this week for the escalating violence between his supporters and anti-Trump protesters. 

Kansas City Police reported that they used pepper spray twice at the event.