The White House is where the President works and resides.
On the ShowEdit
In 1982, Ronald Reagan watched Steve's impersonations of him here.
After gaining eternal presidency, Reagan regains access to it, forcing Barack Obama to leave.
It is seen again in "A Gentleman's Bet", where Reagan "plans" a solution for overpopulation, which ultimately results in Pony and others conjuring a solution and sending their idea to Reagan.
When a spell by Leonard goes catastrophically wrong, the White House is shown futilely trying to block the fog resulting from it out, and everyone both in and out of it die save for Pony and Frank.