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 (against NBC’s “The Philanthropist” debut and a repeat of “CSI: NY” on CBS). The special tied some 8 p.m. comedy repeats as the lowest-rated program on a major broadcast network.