He creates a setup. He places a $1000 bill, a glass of whiskey and a gun on a table. He then calls his son in. His son barges in “Hey Dad”
He shows his son the setup and tells him to choose.
The son without a second thought picks up the bill, puts it in his pocket. Without further ado, he drinks the entire glass of whiskey in one go. He then picks up a gun starts to threaten everyone else in the room to empty their pockets.
The politician stands up, hugs his son and with a heart filled with emotion exclaims ” HE IS MY SON!”