Sources: 

Former President Donald Trump has raised concerns over President
Joe Biden's health following the announcement of his diagnosis with
stage 4 prostate cancer. Trump suggested that Biden's administration has been secretive about his health, which he believes could jeopardize national security.
Biden's office confirmed the diagnosis, stating that the cancer had metastasized to his bones, marking it as the most advanced stage. This revelation has sparked questions about the transparency of Biden's health status, especially as
74% of Americans expressed in a January 2024 poll that they believe he is too old for the presidency.
Trump, speaking to reporters, questioned why the public was not informed sooner about Biden's health issues, stating,
"I'm surprised that the public wasn't notified a long time ago because to get to Stage 9, that’s a long time," referring to the progression of the disease. He emphasized that the lack of information is
"dangerous for our country", particularly in light of international conflicts such as
Russia's war in Ukraine.
The debate over Biden's health comes as he faces no serious challenge for the 2024 Democratic nomination, with party leaders affirming his capability to serve another term despite public concerns about his age and health.
Sources: 

Former President Donald Trump criticized President Joe Biden's secrecy regarding his health, particularly after Biden's recent diagnosis of stage 4 prostate cancer. Trump claimed this lack of transparency poses a national security risk, especially amid ongoing global tensions, including the war in Ukraine.