Dr. Curtiland Deville, a professor of oncology at Johns Hopkins School of Medicine, discusses former President Joe Biden’s diagnosis of an aggressive form of prostate cancer. For more context and news coverage of the most important stories of our day click here: https://www.msnbc.com/ » Subscribe to MSNBC: https://www.youtube.com/msnbc » Subscribe to MSNBC on TikTok https://www.tiktok.com/@msnbc…