One of the very first posts I made on this site, back in 2017, was a county map for the 1988 election from The Biden Express by
@Whanztastic . I've remade it because I feel like I was pretty green when it came to knowledge about electoral politics. This time I examined the voting results of each state. Here, Democrats have a national swing of 10.2% more in their favor than OTL, though it is not evenly distributed. In the case of Alaska and Maine's 2nd Congressional district, Libertarian Party candidate Ron Paul comes in second place, though he still barely misses winning any boroughs or counties.
It's really interesting to realize that Dukakis, despite his failure, was the last time Democrats put on a competitive performance in many rural, deeply conservative parts of the country. With that in mind, this map doesn't seem that implausible had the right candidate been nominated.