President Donald Trump said he and first lady Melania Trump were 'saddened to hear' about former President Joe Biden's cancer diagnosis.

"We wish Joe a fast and successful recovery," the president said on Truth Social, after his predecessor was diagnosed with an aggressive form of prostate cancer.

Sympathetic reactions poured in from leaders across the political spectrum Sunday as former President Joe Biden, 82, was diagnosed with an 'aggressive form' of prostate cancer.