Too much advertising can work against you.
I remember all the “concern” earlier in the campaign that Trump wasn’t advertising much, and Hillary was blanketing the airwaves.
In fact, Hillary was wasting money and annoying potential voters, and Trump wisely held his fire until the time was right.
I don’t watch much TV, so missed out on many of the campaign ads. However, I watched a bit of the 7th game of the world series. The Clinton machine slimmed the world series with one of their Trump sex attack ads. I thought it was totally inappropriate.