I am certain he will lose the popular vote again, but the EC is another story obviously.
I wonder how he will manage to cobble together a winning coalition in Pennsylvania, Michigan, Wisconsin, and Florida running against someone who hopefully isn't as scandal-laden and unpopular as his 2016 opponent. Also he has a record to defend and many who brushed off the warnings of his unpreparedness from the 2016 Democratic nominee have seen the predictions more or less come to fruition. The majority of the people who voted in these states did not vote for him. Let's see if lightning can strike twice.
Regardless of who the Democrats nominate, the media and Republicans will ensure they are "unpopular and scandal-laden" by election day. Mark my words.
They even managed to successfully demonize milquetoast candidates who were as inoffensive as humanly possible like Gore and Kerry.
Re: Gore and Kerry that seemed like typical hyper-partisan unpopularity that will swarm any nominee.
Democrats would have to work pretty damn hard to nominate a candidate as polarizing and unpopular as their last one. She had many people that were supposed to be a part of her coalition that were literally disgusted and repulsed by her but voted for her to stop Trump. I do not see anyone that unpopular being able to bulldoze their way through the primaries again.