I believe that there are a majority of silent Trump voters that will put him back in office, do you agree?

No, I do not agree, but I won't say that such a thing is not possible.  My thinking is pretty simple: Trump supporters are notoriously open and loud about their support for him.  There aren't a lot of "shy" Trumpites around.  You would need a lot of such "shy" Trumpites for what you believe to actually come true.

Besides, even if there are such shy Trumpites, they probably are not numerous enough to win the election without having a good split among the independents, the people who aren't very loyal to a party, and really, Trumpism is not a drink that many like in moderation.  You either love it or you despise it.  Trump is not someone you have mixed opinions about, not a "I can take it or leave it" type of thing. Most independents have abandoned Trump for "anyone but Trump".  These are the people who will probably ensure that Trump gets tossed out on his ear in the upcoming election.

Didn't work out so well for him in 2018. Won't work this time either.

Not in the least bit.  Trump voters do not tend to be silent.  They tend to be loud, like him, which is why they like him, and why his rallies are popular.  You should be more worried about Democrats who never got out to vote last time, finding it easier with being able to mail it in.

I seriously doubt it, I know of a few Republicans that will be voting for Biden for president and Republican on the down ticket,, they understand Trump is a disaster and an embarrassment and they would rather see a Democrat president with a Republican congress than four more years of Trump.

Do you believe in the Great Pumpkin too?

No, Hillary got 3 million more votes so where is the silent majority? Trump is finished this time

There are no silent Trump worshipers.