Illusion of Choice

If multiple players cast Illusion of Choice during the same turn, the controller of the one that resolved most recently will choose how each player votes that turn.

Wotc — August 23, 2016

If another player controls Ballot Broker, that player first takes their “normal” vote with you choosing the result, then that player decides whether they are taking the additional vote. If there is an additional vote, you again choose the result.

Wotc — August 23, 2016