Trump Closes the Gap as Post-Debate Polls Show Biden's Lead Shrinking Over Concerns of Mental Fitness

Initial post-debate polls showed former President Donald Trump gaining some ground against President Joe Biden in the days following their first debate, narrowing Biden's lead or pulling ahead in some national surveys. Post-debate polls found Biden's ratings on traits like mental fitness declined, including among Democrats. Some have discussed Biden potentially dropping out. Kamala Harris led polls on who Democrats would prefer to Biden, but hypothetical replacements generally polled similarly against Trump.