Enter the following codes while the Wiimote is held vertically at the "Press A" message at the title screen. Select "Play Now" mode, then press Plus at the team selection screen to have the corresponding team appear.

TEAM - CODE
Beastie Boys Team - Press UP (2), DOWN (2), LEFT, RIGHT, LEFT, RIGHT, B, Plus.
Democrats Team - Press LEFT (13).
Republicans Team - Press RIGHT (13).
J. Cole and 9th Wonder - Press UP, LEFT, DOWN, RIGHT, UP, LEFT, DOWN, RIGHT, 1, 2.