As the US election slowly draws to its conclusion, one of the areas of confusion is that different media outlets are showing different results for the electoral votes.
The president is elected by winning at least 270 electoral college votes, not the outcome of the popular vote.
According to The Guardian, there is no centralised federal election system, it has become tradition in the US that "decision desks" at media organisations make a call that states have been won by one candidate or the other when enough votes have been counted. States that are too close to call – such as Nevada and Georgia at the moment – remain in the balance until a network "calls" them.
The Guardian uses the data collected and analysed by the Associated Press (AP) news agency as the source for when we will call election results. There are a number of other highly reputable election decision desks in US media, including NBC, Fox News and others. They may call races earlier or later than AP. US networks obviously use the decisions from their own desks – other channels may chose to follow one, or wait for two desks to call a state before they count it.
This year, Arizona has brought this into sharp relief. Our current total of 264 electoral votes for Joe Biden includes the fact that AP has called Arizona for the Democratic nominee. So have Fox News – attracting the ire of the Trump campaign. Not all decision desks have yet.
The Trump campaign disagrees. Biden's lead is currently down to about 68,000 votes in the state – or less than three percentage points – with 88% of the votes counted.