Has Trump's level of support always been there?

[mencken]

I think the more interesting question is at what points in the race would Hillary actually have won if the election were held that day. It seems like we can't really trust what the polls had said and that it was always much closer than it appeared. So when was she actually winning?

Moving the date of the election would merely move the date of when the "undecideds" ultimately admitted to themselves that they were actually going to vote for Trump.