A younger Democrat could win against Trump

People polled in swing states are more likely to turn towards the Democrats if Joe Biden was replaced by "younger Democrat who is qualified for the job".

(Question: Imagine you have to choose between two people for President: Donald Trump or another candidate. The other candidate is a younger Democrat who is qualified for the job. How would you decide who to pick?) Survey sample: 1000 voters in each state.
Chart: Alicja Hagopian Source: Emerson College Polling, July 15-16
Independent