0 in the United States, a part of a news organization whose job is to decide when enough votes have been counted in an election in a particular place for the organization to report who they believe has won there:
CBS will be giving viewers a tour of its "decision desk," a collection of experts who analyze data and weigh whether the network can make a projection.
There are a number of reputable election decision desks in US media, including AP (Associated Press), NBC, Fox News, and others.
Welch spent much of the night at NBC's decision desk, where election returns were projected.
"There are cases where the exit poll has been off," said Dan Merkle, the head of ABC News' decision desk.
AP and Fox News have called Arizona for the Democratic Nominee, but not all decision desks have yet.
