Fox declined outright to air the news conference. NBC and ABC fell into line late Monday after the White House shifted the event's time from the previously announced 9 p.m. to the lesser-watched hour of 8 p.m.
The stakes were particularly high for NBC, which airs the most-watched show of the summer, "America's Got Talent," at 9 p.m. This week, the reality hit includes a heavily promoted interview with "Britain's Got Talent" singing sensation Susan Boyle.
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