One has to assume that Barry has already told Slow Joe that Hill is headed for the big house and that is why Joe is jumping in. Barry will most likely let her twist in the wind until administering the coup the frappe at the most opportune time, i.e. when Joe needs a jump in the polls.
However, timing of Obama/president ValJarr betrayal has to be impeccable. Otherwise, it will drive tons of ‘sympathetic’ votes towards Hillary.
Timing is everything. Probably a week before the Iowa caucus.