President Obama's approval ratings may be way down, but his TV ratings remained high Wednesday night as he delivered his State of the Union address to Congress and the nation. According to preliminary overnight figures, the address averaged 30.69 million viewers on the broadcast networks, ABC, CBS, Fox and NBC. No figures were immediately available for the cable networks that carried the speech and Nielsen acknowledged that even the broadcast figures might be subject to substantial revision due to the live nature of the telecast. Eyebrows were raised in particular over Nielsen's claim that the Fox network's Obama coverage drew the largest number of viewers, 8.96 million. (Ordinarily the Fox News cable network outdraws its broadcast sibling with coverage of such events.) But Fox's numbers were undoubtedly boosted by an 8 00 p.m. edition of American Idol that attracted a whopping 24.75 million viewers.