Ending months of suspense and speculation, Arnold Schwarzenegger, 56, confirmed on last night's Tonight Show with Jay Leno that he will run for governor of California in the Oct. 7 recall election. "I can promise you... I will pump up Sacramento," he said. The news took many by surprise, considering last week rumor had it the actor was about to back out of the race due to family concerns. But at a press conference yesterday, Schwarzenegger said that his wife, Maria Shriver, eventually came around. "She was concerned about the children, but then she [said]... 'I support you no matter what you do.'" Well, that's not entirely true. According to sources, Shriver is prepared to leave her hubby should he decide to do a sequel to Collateral Damage, End of Days, Junior, Last Action Hero or Red Sonja.