The urban wing of the party will keep electing progressives and the suburban wing will keep electing moderates. Both sides need to just deal with this fact and de-emphasize issues that divide the party such as policing, Israel/Palestine.
Fat chance. The consensus is split, but moving in one direction. Neoliberalism and imperialism are out. Multiethnic democracy and democratic socialism are in. Those who don't like it are welcome to form a third party like they told leftists to for decades.
The anti-Israel UK labor style wing of the party would cause another 1992 style realignment if they ever got real power. The GOP never recovered from the toxicity from the rise of the religious right and has been stuck scrapping for narrow victories since (have gotten lucky twice). A Dem party that is like Labour might start not just places like MI, WI, PA but ones you would never expect like Rhode Island, New Jersey, Connecticut, Maine. It's not just Jews..Asians and moderate/liberal white Catholics will oppose stuff like eliminating the SAT and standardized tests.
And a mighty fine job their new centrist leader's done.
In fact, he's done such a good job he may not even lead them to the next election.