Biden, even after he has exited political life and as he faces a serious cancer diagnosis, remains a factor in the conversation about his party's political future.

Prostate cancer is one of the most common types of cancer in the U.S., and often treatable. One urologist says Biden has good options ahead — largely thanks to recent advances in research.

Political leaders from across parties in the U.S. extended their sympathies to Democratic former President Joe Biden, 82, after his office announced Sunday that he was diagnosed with an “aggressive” form of prostate cancer.