Before his cancer diagnosis, Biden had been taking the train from Delaware to Washington, meeting with his post-presidential staff, allies and former Cabinet secretaries, accordin

Former President Joe Biden was diagnosed with an "aggressive form" of prostate cancer, his office said in a statement on Sunday.

Former President Joe Biden is being treated for prostate cancer, one of the most common cancers among men. Biden’s cancer is an aggressive form of the disease, and has spread to his bones, according to a statement released Sunday by his office.