There won't be a "Blue wave" in our lifetime. You don't go from 54% of Americans not being able to read above a 6th grade level to wide support for progressive policies. If dems can appeal to some of this group - as well as reluctant voters (Those who stay home unless they feel super energized) we might get a small democratic majority.
As to commenter, Donald received 74.2 million votes in 2020.
The only way there is a blue wave is if the GOP screws it all up so much that we have a 2nd great depression, and need a new "New Deal". There are a lot of safeguards in place to prevent that kind of thing - but its happened in Argentina when they decided to give a libertarian their executive. Inflation reached 236% there.