For a fatherless child, a male teacher may become a father surrogate.
In Republican caucuses, each candidate is allowed to have a surrogate stand up and give a short speech pleading for votes.
Spouses and children have been dispatched as surrogates across the plains.
Mrs. Clinton mostly left the beating up of Mr. Sanders to her Democratic surrogates.
So the Texas Senator trotted out a special surrogate Friday to squash the storylines that may be blunting his momentum.