Exactly. Hillary! has been handed a bunch of lemons, and has decided to make lemonade. It is clear to all than ANDREW, even with massive voter fraud and ballot box stuffing, is a lost cause. You can steal elections, but not when your guy is running that far behind. So it is clear to Hillary! that ANDREW is going to lose.
So how does Hillary! avoid the stench of being associated with such a loser? Well, if a story were to reach the press that he was mixed up with the mob, then his loss could be chalked up to his own failings and things that were really beyond Hillary!'s control. So it's not really a repudiation of Hillary!ism when he loses.
But would Hillary! be so devoid of morals that she would stab a loyal supporter in the back just to avoid personal embarrassment? Of course she is!
And then, after the primary, ANDREW can pull his father's patented "Your pointing out the obvious and manifest fact that I am tied to organized crime is nothing but a ethnic slur" move, and The New York Times will grant him absolution to go and sin no more.