what (one) is driving at
The point one is trying to make. He's been talking for 10 minutes, and I still can't figure out what he is driving at. Is there a point? What I'm driving at, ladies and gentleman, is that the time for action is now.
what somebody is ˈdriving at
the thing somebody is trying to say: What are you driving at? Try to explain what you mean more clearly.I wish I knew what they were really driving at.