ABC's White House special struggled for viewers President Obama's town hall meeting on health care delivered a sickly rating Wednesday evening. The one-hour ABC News special "Primetime: Questions for the President: Prescription for America" (4.7 million viewers, 1.1 preliminary adults 18-49 rating) had the fewest viewers in the 10 p.m. hour. The special tied some 8 p.m. comedy repeats as the lowest-rated program on a major broadcast network. The special was shot at the White House and featured the president answering questions about his health care plan. The president's primary message was that those who like their current insurance will...