There are two lists Trump is going by for running mate VP.
First list is the “people being considered”, which is a long list, includes all the past and current VP contenders that we see in the news.
The second list is the “one that will be the VP running mate”. This list does not include ANYBODY from the first list. This list is very short - it’s only one name.
The first list may, or likely, will grow.
The second list is fixed in solid granite.
Yes I don’t see Trump picking anyone from the list that’s being bandied about. I’m have always felt like it would be Mike Flynn. My personal pick is Rand Paul. But not likely to happen.