Those that know Trump says he is an excellent listener. He seeks out the opinion of others. Surely he wanted the full measure of the man - Romney.
And it bought favor from others that Trump would meet with him. By continuing to bring in other potential candidates for the position, Trump is showing that the choice for SOS is important and that he has not made a decision yet.
Exactly, one thing I think Trump is great at (I had a boss like this) is to float an idea for a policy or nomination to see how is team (or the public) reacts and what logic they have for or against it. Then in all these tidbits lies the correct answer of what needs to be done.
My old boss would float an idea we all thought was bad and then we would gang up on it together and work our way to an alternative that made sense that we all agreed with and bought into. If we agreed with his bad idea, then you got secretly labeled as a ‘yes man’ and you were like off to a new assignment.
That is leadership.