Breaking news: Trump diagnosed with Covid-19

Which factors put the US president at risk, and how are his doctors responding? What to expect for the remainder of the presidential campaign?

Read the Guardian Explainers feature to get the facts.

While panic and confusion have permeated the White House, amid fears of what could happen if the President is incapacitated, how this would affect the upcoming election, and mounting concerns over the rapid spread of the virus within the building that could disrupt the functioning of the government itself, the event is snowballing as a number of Republican senators look to have been infected in the "White House cluster" (suspected to be the ceremony for the nomination of judge Amy Coney Barrett to the Supreme Court).