Before anyone starts getting a bit too high off their own supply
Harris's polling averages peaked on August 12th. They were stagnant or declining on the 13th and 14th, briefly spiked on the 15th, and that spike was completely undone on the 16th. Today is dropping again. Not big drops, like 1/10th of a point every other day(which day depends on which conglomerates you use), but the growth trend is over.
Today is an all time high on slightly right leaning RCP, and a slight rebound on 538(But not to 12th/13th/15th levels). More like 16th or 11th evening. RCP tends to lag a bit on D rises and vice versa for 538 so we'll see. Still suggests the overall strong growth trend passed and we're nearing a ceiling. Not a bad ceiling, a winning ceiling, but it's there.