President Donald Trump will make a remark on Friday about his administration's efforts to develop and commercialize a coronavirus vaccine known as Operation Warp Speed.
Trump was supposed to speak in the rose garden at 4 p.m. ET, according to the White House. But the president tweeted at 4:07 p.m. that the press would start "in 15 minutes".
The event marks Trump's first personal public statement in a week, and his first since NBC and other news outlets predicted Joe Biden would win the presidential election.
The update on Operation Warp Speed also comes five days after the pharmaceutical company Pfizer and the German biotech company BioNTech announced that their lead vaccine candidate is more than 90% effective against Covid-19 based on preliminary tests in the third phase.
Trump celebrated this breakthrough in an all-caps tweet and said the vaccine was "COMING SOON".
President-elect Biden gave a more moderate response, noting that it would be months before a vaccine could be distributed across the country.
With no evidence, Trump later accused the Food and Drug Administration of withholding vaccination results until after the election to hurt his chances against Biden.
Trump has refused to give the election to Biden. For days, Trump has falsely claimed that he won the competition and launched a number of unsupported conspiracies about widespread fraud, despite assurances by his own administration that there is no such fraud.
Meanwhile, Trump's campaign efforts to challenge states' election results in court suffered several setbacks on Friday. The campaign dropped a legal challenge in Arizona and a judge in Michigan denied a motion to prevent that state from confirming its election results. In Pennsylvania, the state that exaggerated Biden, Commonwealth Secretary Kathy Boockvar announced that she would not order a recount of ballots.
NBC forecast on Friday that Biden would win the race in Georgia, get the Democrat 16 more votes and turn around a state that has reliably voted for the GOP presidential candidate for decades. Trump will win North Carolina, NBC also planned Friday afternoon.