Scrutiny over former President Joe Biden’s decline is already testing 2028 hopefuls, particularly those who were involved in his administration. The announcement that Biden was diagnosed with an aggressive form of prostate cancer on Sunday came amid a fresh reckoning in the party over the former president’s mental acuity and whether he should have withdrawn

The focus on the former president comes as the party needs to look forward rather than backward to exit the political wilderness.

Joe Biden’s time in public office is now behind him, but his age and mental acuity have become a litmus test for the next leaders in his party