The disclosure in the early hours of Friday morning that Donald Trump and his wife Melania had tested positive for coronavirus sent officials scrambling to find out who else in the president’s circle may have been infected.
Hours earlier, Hope Hicks, a close aide, received a positive result, having come down with Covid-19 symptoms on Wednesday.
A timeline of the week raises questions about whether some events, including a rally and two private fundraisers, should have gone ahead.
Saturday, September 26
Between 150 and 200 guests, plus the press, file in to the Rose Garden to hear Mr Trump’s nomination to the US Supreme court. Among those guests were Mr Trump’s campaign manager, Bill Stepien, former New Jersey governor Chris Christie and former aide Kellyanne Conway.
Also in attendance were Republican Senators Thom Tillis and Mike Lee, who was seen hugging various guests including Father John Jenkins, the president of Notre-Dame university. All have since tested positive for the virus.
Tuesday, September 29
The president is cheered by a crowd as he departs the White House for Cleveland, Ohio. He is accompanied by his family, including First Lady Melania Trump, and aides including Ms Hicks.
The first presidential debate between former vice-president Joe Biden and Mr Trump takes place. Some members of the president’s family, including his daughter Ivanka, were seen not wearing masks as they watched the event. Ivanka Trump and her husband Jared Kushner have tested negative for coronavirus.
Wednesday, September 30
Marine One leaves the White House for Joint Base Andrews carrying Mr Trump and aides Dan Scavino, Stephen Miller, Mr Kushner and Ms Hicks. Air Force One then departs for Minnesota. Among the travellers on the president’s plane were Minnesota congressmen Jim Hagedorn, Tom Emmer and Pete Stauber, according to the Duluth News Tribune.
At some point on Wednesday, Ms Hicks feels unwell and quarantines on Air Force One.
The president arrives in Minneapolis and is greeted by local Republican leaders including Paul Gazelka, Kurt Daudt and Jason Lewis according to the Star Tribune.
Mr Trump’s motorcade arrives in Shorewood, Minnesota, for a private fundraiser. The event is hosted by Marty Davis, chief executive of Cambria, a maker of quartz countertops.
A crowd in Duluth, Minnesota, applauds the president at a campaign rally. The audience was packed tightly together and most were seen to be not wearing masks. The rally was attended by more than 3,000 people.
The presidential party leaves the rally to return to the White House.
Thursday, October 1
The president departs the White House for the Trump National Golf Club in Bedminster, New Jersey, for a private roundtable with supporters and a fundraiser. The administration learned of Ms Hicks’ positive coronavirus test shortly before Marine One took off, according to White House chief of staff Mark Meadows.
“In terms of Hope Hicks, we discovered that right as Marine One was taking off yesterday. We actually pulled some of the people that had been travelling and in close contact,” Mr Meadows said on Friday.
According to Centers for Disease Control and Prevention guidelines, those in contact with Ms Hicks should have quarantined themselves at this time. It is unclear why further events were not cancelled.
The fundraising event was reportedly attended by about 100 people, according to the New York Times. New Jersey governor Phil Murphy later urged attendees to get tested and self-quarantine.
Mr Trump returns to the White House.
Mr Trump tweets that he and his wife Melania are quarantining as they await results of coronavirus test following Ms Hicks’ positive test.
Friday, October 2
The president and first lady have received a positive coronavirus test result, Mr Trump announces in a tweet.
Mr Meadows tells a group of reporters that the president is experiencing mild symptoms and is quarantining in the White House residence.
On Friday, Mr Biden tested negative for coronavirus, as did Ivanka Trump and Mr Kushner.