It's just a matter of who can grease enough palms and buy off enough loyalty for the votes in the DNC. If Hillary runs, she'll likely still have millions in Russian (and other) cash sitting some place offshore in a fake CF account.
In the absence of someone buying the DNC ala 2016, it's going to be a free-for-all.
Also, strongly suggest to you resident LibDerps that you rally your party to install a firewall, maybe farm that out to a Managed Security Company, have DNC staffers stay off all the Russian troll porn sites and get the DNC chair to elevate their PW beyond "password" or the mascot of their favorite college.