 This amplified concerns about the president's age. The president saying, I am not a young man. I'm not as a smooth talker as I used to be. I don't walk as easily as I used to be. I used to. I don't debate as well as I used to. And she quoted from former House Speaker Nancy Pelosi. It is not about performance in terms of a debate. It's about performance in a presidency. CBS News also spoke exclusively to Vice President Kamala Harris today about the president's fitness.