The Iron Hand (1916)

After political boss Tim Noland adopts Roy, a dead crony's infant son, he reluctantly gives the boy up to a doctor who claims that if he's raised in a respectable environment, he will grow into a model citizen. Roy returns 20 years later to live with Tim and is appalled at his unscrupulous methods of conducting business. Then he falls in love with Enid Winslow, the daughter of a social reformer who is running for office against Tim. Largely due to Roy's financial support, Winslow wins the election, but, holding a grudge against Tim and anyone connected to him, he refuses to let Enid marry Roy. The breach between the families is healed, however, and the marriage planned, when Tim offers to pay all of Winslow's campaign debts.