Biden's 2024 campaign faces doubts over age and promises.

President Biden's upcoming reelection campaign is expected to be grueling, with doubts raised about his ability to handle the rigors of campaigning and his age. Allies acknowledge there will be a higher bar for Biden this cycle, with Republicans already making age and mental acuity part of their argument. However, Biden has sought to quiet the criticism ahead of his expected campaign launch in April or May, with the first lady pointing out his recent travels to Ukraine and Poland. Despite polls showing concerns about his age, Democratic strategists believe campaigns have to adapt to the candidate they have.