So I do tend to find these kinds of claims sensational, so I decided to look into the article and it's sources. First the article quotes an economists article which is referencing a survey from a Poly Sci associate professor from Denosian (sp?) Univeristy. That's not a good start, quoting a quote.

Sadly the economist article was paywalled, but I was able to find this article based off of the facts in the posted article https://religioninpublic.blog/2019/11/25/was-donald-trump-anointed-by-god-are-all-presidents-anointed-by-god/. This article seems to be what is being quoted, but not 100% sure (actually it's an updated post to what looks like the original survey). In this article, by the professor being quoted in the posted article, we see that they surveyed 1000 Protestant Christians and found 30% of those surveyed, that went to church weekly, believed that Trump was appointed by God.

So really not a good article at all. Not only are they not quoting original sources, but they get the facts horribly wrong. On top of that the original survey doesn't post information about how they conducted their survey, so not even a good job by the original source.