  We study the repeated interactions between two power-hungry agents, the
``friend'', and the ``enemy,'' and one power broker, the principal. All three
care about the leading agent's policy choice. The principal, who aligns more
with the friend, can influence but not fully control leadership allocation.
After an initial cordon sanitaire breaks, the principal embraces the enemy,
sometimes promising persistent support: she grants the enemy power in exchange
for moderation, which benefits the friend who reciprocates. The closer the
principal is to the friend, the more she desires to embrace the enemy, but the
harder it is to uphold such promises.
