 And they feel that, look, Donald Trump supporters aren't going anywhere. That is fully baked. But they do feel that he doesn't have a lot of room to grow. So the president tonight is going to try to reach out to those critical, independent, undecided voters and see if he can convince them to join him. But perhaps more important than the substance, many voters will be paying close attention to his performance. The president has to convince voters who are concerned about his age that he can do this and also convince worried Democrats that he can win, David.