The former politician's appearance at the sporting event comes a month after he announced that cancer has spread to his brain. He began radiation treatments for the four "small" cancer spots doctors found.
"I just thought I had a few weeks left. But I was surprisingly at ease. I've had a wonderful life, I've had thousands of friends, and I've had an exciting and adventurous and gratifying existence," Carter said. "So I was surprisingly at ease. Much more so than my wife was. But now I feel that, you know, it's in the hands of God and my worship, and I'll be prepared for anything that comes."