People seem to forget that Trump picked Pence not just to convince Evangelicals to vote for him, but also because he felt that with his white hair and stiff demeanour, he "looked like" a Vice President.

I don't support choosing candidates based on their appearance, but Trump certainly does. And Stefanik looks more like a housewife. If Trump picks a woman as his VP it will be a woman whom he thinks is more attractive than that.