If Biden loses, Democrats are going to have to come terms with two things.
First, you can't build a winning electoral coalition with only college educated voters. This coalition is an advantage in midterm and off-year elections, but not in a general election when most people are going to vote. They are still outnumbered 2 to 1, and the number of young Americans choosing to earn a college degree will decline in the coming decades as the value of a college education declines. Choosing to appeal to minority voters without a college education based just on racial fear tactics will be less effective as younger Americans have no connection to the civil rights movement and no memories of the Reagan presidency.
Second, how America views itself in the context of the world has changed. As the last of the WW2 veterans die off, younger Americans have no understanding of why the current world system was set up the way it was. The wars in Afghanistan and Iraq were objective failures. Our allies are now seen as freeloaders, and free trade is now seen as a net negative. Same with immigration. Democrats will need to wrestle these issues from Trump and build a popular public association with their own party as the party of a new, more inward looking America. With the right candidate in 2028, this is possible (just look at how Republicans did an about face from Bush in 2016 and took the anti-intervention issue from Obama).
Not just that they can't win with only college ed voters, college whites are quite pro-Israel (outside white athiest leftists under 30) and not the most in favor of redistributive economic policy. Dems might find themselves completely f***ed if these voters go back to 2000-2004 numbers, which they will if the Dems foreign policy involves supporting foreign terror groups. Combine that with Asians flipping red, GOP winning 45% Hispanics and Dems getting 23% of the WWC vote, it could be a long decade.
I find it very very unlikely college educated voters will revert to 2000/2004 numbers anytime soon, even if Dems do something they dislike with foreign policy. A large part of why this group has shifted left is because who's in the group has also changed pretty dramatically - you're college educated voter who graduated in the 80s is the not the same as your college educated voter who graduated in 2000 or 2020.
