It’s really the optimal strategy for the Democrats, from their point of view, for 2024.
They will likely throw money behind Trump, or behind DeSantis, whichever turns out to be the underdog, to try and split the Republican base. The Democrats won’t have to come up with any policy or strategy besides saying “we’re not the other guy”. A promise they can hold effortlessly. They don’t care if the Republicans win and take total control either, because there will always be the next election, the next “ultimate fight for democracy” where the reins can switch hands for the next 2-8 years again.
Because despite what the Democrats claim, the United States will never get rid of the election clown show. It would simply not be in its geopolitical interest to be seen as a one-party dictatorship. Both parties use the pretense of democracy to intervene in other countries, and they still need it for their upcoming battles. It is an essential part of its outward image, no matter how awfully fascistic the ruling party is.