After a stretch of limited public appearances since leaving office, former President Joe Biden’s cancer diagnosis arrived amid heightened scrutiny of his cognitive health.

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.

After the announcement that Biden has an aggressive form of prostate cancer, Trump Jr. initially reposted a message on X (formerly Twitter) wishing Biden a “speedy recovery” and writing, “Agree 100%.” But he quickly pivoted to attack mode, taking aim at former first lady Jill Biden, who holds a doctorate in education and is not a medical doctor.