Minutes before, O’Brien had admitted that legitimate protesters have a right to be on the streets, but blamed "Antifa radical militants" who are using "military tactics" to kill and hurt police officers.
This is despite the fact that multiple police forces have called in backup from military personnel stationed around their state, and there is footage demonstrating the use of military level equipment by police forces to monitor and suppress protestors.
Trump has said that he will be designating Antifa as a terrorist organisation – but it's not an organisation. Loosely defined, Antifa is the common term for anti-fascists, but there is no coherent organised Antifa group, and people of all political persuasions may call themselves "Antifa".
"Antifa" has become a rallying cry for many people within the Trump administration, as well as outside of it.
O’Brien also said on CNN’s State of the Union that the tweets which Trump had sent over the weekend, where he called protestors thugs, were meant to ‘de-escalate’.
Footage from protests around the US show police officers using tear gas, rubber bullets and arresting protesters and journalists, often in view of cameras.