1. PRO = requires guts and some adherence to principles of legality, therefore unthinkable, unless he drops some acid in Hillary's cocktail first. 2. CONTRA = admit openly to world you are a mindslave of Likud/AIPAC, further jeopardize re-election chances. 3. ABSTAIN = hedge bets, engage in happy-talk while working covertly to oppose decency, then when later begging for votes claim this gutless get-out was your 'finest hour'. It is easy to see that option 3 will naturally be selected as the least bad, if pushed to a vote - which no blackmail efforts will be spared in trying to avoid. If the PA really do this, then expire, at least their whole existence will not have been a waste.
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)