U.S. President Joe Biden is under scrutiny for repeated public gaffes.
There is an increasing concern about his cognitive abilities.
A report from special prosecutor Robert Hur highlighted Biden's 'serious memory limitations'.
Republicans are using this opportunity to challenge his capacity to lead the country.
Cognitive slips have become a central issue in the electoral campaign.
Conclusion: Concerns over Biden's mental capacity are becoming a major issue in the electoral race, and how well he can limit the impact of these issues on public perception will likely determine the success of his reelection campaign.