LOS ANGELES (AP) - A television station apologized to Gov. Arnold Schwarzenegger Friday after discovering that several Democratic activists were in its audience for a voter forum. The forum at KNBC was intended to help voters learn more about Schwarzenegger's slate of initiatives on Tuesday's ballot. But the Republican governor was peppered with questions with a partisan slant during Thursday's broadcast, and at one point a man in the audience tried to shout him down. The audience of about 75 people was selected by a research company, which was directed to assemble a balanced group of voters from the Los...