So says Nielsen, which provided the charts above (sorry about the small image) and below and this summary:
In a continued push for congressional support of health care reform President Obama held his fourth prime time press conference on Wednesday July 22, 2009. The conference was carried live from 8:00PM to approximately 9:00PM on 11 networks. The sum of average audience for those networks was 24,682,519 viewers and had a combined household rating of 16.3. The networks carrying the press conference were ABC, CBS, NBC, Univision*, Telemundo*, BBC-A, BET, CNBC, CNN, FOX News Channel, and MSNBC.
Viewing to last night’s press conference was down 14% from his April 29 press conference and down 50% from his first primetime conference on February 9.