Trump says he's 'surprised' public didn't know about Biden’s cancer diagnosis sooner

"I think it's very sad. Actually, I’m surprised that it wasn’t, you know, the public wasn’t notified a long time ago, because to get stage 9, that’s a long time,” Trump told reporters at the White House.

Biden's office disclosed Sunday that he has been diagnosed with an "aggressive form" of prostate cancer that has spread to his bones.

"Last week, President Joe Biden was seen for a new finding of a prostate nodule after experiencing increasing urinary symptoms," the office said, adding the disease was “characterized by a Gleason score of 9” with “metastasis to the bone.”

The office said the 82-year-old former president and his family are currently reviewing treatment options with his medical team.

"It's a very, very sad situation. I feel very badly about it," Trump said.