I don't know if it's true that the Trump campaign has no ground-game. Either way, we need to bite down and BE the ground-game. Talk to people. Don't just point out Trump's positives, remind people of Hillary's worst points.
That assumes each of those groups has credibility.
I see no reason or statistics that support that assumption.
IF you take a look at hotair.com, they have quite a few good articles about the various polls coming out and what the Trump ground game looks like. My initial opinion is that it does not look like Trump has a good ground game on and he needs state and local party support and he is not reaching out as he should to get local support going. Most here seem to have their blinders on saying Trump is going to win in a landslide and dismissing or ignoring current poll numbers.