I'm thinking that openly lying constantly, and not caring, and just going on with more lies, and then more lies, until you end up averaging about 4.5 lies per day, that's certainly breaching the "norms." So is promoting equivalency between people who are opposed to Nazis, and Nazi themselves. And being reluctant to condemn the KKK. The man wakes up every day and breaks every political norm imaginable, knowing that his supporters don't care, and will give him license for anything, as long as it's cruel, and mean. Those are norms that no other president in recent history has ever breached.