The leftist sheep who abandoned her for Comrade Bernie will all flock together in the fall to vote for her if she is the nominee. In their minds it’s better to support a corrupt, corporate shill like Hillary over any Republican because at least she shares most of their very warped leftist worldview.
You're 90% correct. A percentage — I'd guess about 20% — of the young dingbat Dems won't show up to vote at all if Bernie is not the nominee.
And the 'First Woman President' bit?
Who on earth wants that honor - First Woman President - going to a manipulative, untrustworthy liar like Hillary?
No one. No one except Hillary's old hag friends who are too stupid to use a computer and still get their news from the MSM... Asked about the email scandal they ask, "What's email?'.
The young and intelligent will sit home on election day if Hillary's the nominee. Old women and young high school drops out with criminal records will be her only base.