House Speaker Mike Johnson said he has witnessed President Biden's decline behind closed doors and hinted at Republican discussions about investigating any Democratic attempts to conceal it. Johnson also implied that Republicans would contest any effort by Democrats to replace Biden as their presidential candidate, despite Donald Trump's increasing lead in the polls. Johnson expressed his concern about Biden's projection of weakness on the global stage during a dangerous period. He accused Democrats of engaging in a cover-up, claiming they knew Biden was incapable of performing his duties. Johnson predicted that any attempt by Democrats to replace Biden and Harris on the ticket would face legal challenges in certain states.