Hillary figures the liberals have nowhere to go. Are they going to vote for Trump? No. So she needs to rope in the moderate Democrats, if any are left.
Stop right there. hillary has NO strategic skills. With the release of the emails about the DNC rigging the process even beyond their exclusionary rules, Sanders and his supporters should be demanding Sanders be chosen VP. Except it's beginning to look as if Sanders wanted to make a point, get some vanity stuff that doesn't matter in the platform, and go back to finish his term as a lazy US Senator.
My point? Sanders supporters have been used and abandoned. They should vote for Trump.