Former President Joe Biden says he would have resigned from the presidency and abandoned his 2024 reelection campaign if he had known at the time that cancer was causing him to feel unwell.

“If I had known that I was feeling lousy because I had cancer, I would have resigned,” Biden said in a new interview with PEOPLE. “I would’ve not gone forward, because I don’t think an 80-year-old man with cancer should be running for president.”

Biden, now 83, was diagnosed in May 2025 with aggressive Stage 4 prostate cancer that had spread to his bones, several months after he left the White House. He has undergone radiation treatment and is receiving hormone therapy. He said recent tests have shown that the cancer has not spread further.

Biden rejected suggestions that his health problems were known during his presidency and concealed from the public. “We let the public know when I found out, when I knew what was going on,” he said.

He also defended his decision to continue seeking reelection until July 2024, when he ended his campaign following mounting pressure from Democrats after his poor debate performance against Donald Trump.

Despite acknowledging that he would have stepped aside had he known about the cancer, Biden maintained that he believed he was capable of serving as president. “I believe that on an objective basis, I was the best-equipped person to do the job,” he said.

Biden's comments come as he prepares to release his memoir, Promise Me, America, on November 17. In the book, he also addresses criticism that his cancer diagnosis was somehow concealed, calling the suggestion that he would knowingly hide a serious illness “absurd.”

This article was independently written by the BJL Newsroom based on reporting from PEOPLE and additional published reports.