Sen. Edward Kennedy (D-Mass.) is still sailing while undergoing chemotherapy for brain cancer, the Associated Press reported.

The AP obtained an e-mail from Kennedy's wife, Vicki, who wrote that the only major side effect he feels is fatigue. She said that her husband exercises each morning, often going sailing, and has set a goal of again pushing for universal health care coverage when he returns to the Senate.

She added that he has described his cancer "as a bear," but called him a lion.

Kennedy is three weeks through a scheduled six weeks of chemotherapy.

"I'm betting on the lion," she wrote.