All the others wish they had the kind of support that Trump enjoys. He also has credible crossover support from people who normally would pull the DEM lever.
Exactly the same people that claim Trump has a threshold where he can’t get any more votes said that when he had 20%,25%,30% 35% and so on.They will keep saying it after he wins the election as well.
Trump is a work in progress and is just beginning to accelerate. He’s what the country has needed for two decades.