This is all about those who believe in a pre-tribulation "rapture of the church" reaching for a way to identify the Saints that are president during the tribulation.
I don't decide what I believe before I consult Scripture. I read Scripture, then deduce my position(s). Some truths are identifiable with only 1 verse, while others are comprised of many. It is called proper logical inference.
For example, we arrive at the doctrine of the Trinity through a minimum of 5 verses that say...
a. There is one God
b. The Father is called God
c. the Son is called God
d. the Spirit is called God
e. these three are distinct persons
There is no single place in Scripture that states the proposition that God is one in essence and 3 in persons. One has to use proper logical inference ("connect the dots") to understand this Biblical doctrine, as well as many others.
It is not about connecting dots. To do so can be used to prove anything you wish.
Why not just read the Scripture and believe what is states.