Former US president Joe Biden announced in May 2025, four months after leaving the White House, that he had been diagnosed with an aggressive form of prostate cancer that had spread to his bones. (EPA Images pic)WASHINGTON: Former US president Joe Biden says he is scaling back plans to promote his upcoming memoir as he battles aggressive prostate cancer, acknowledging that the illness sometimes leaves him struggling.

The 83-year-old Democrat, whose health was a major issue during his presidency, said Sunday that he would be unable to make as many public appearances as he had hoped ahead of the Nov 17 release of "Promise Me, America".

"Some days are better than others. It hasn't stopped me. But sometimes it slows me down," Biden wrote on X.