She said: "Under no circumstances will we consider doing so to accommodate the President's inept and haphazard response to the coronavirus pandemic, or give credence to the lies and misinformation he spreads".
U.S. President Donald Trump speaks during a news conference in the James Brady Briefing Room of the White House July 30, 2020, in Washington.
Under the USA constitution presidents and vice-presidents must seek election every four years and in 1845 a federal law fixed that date as the "first Tuesday after the first Monday in November".
Republicans Do Not Want DelaySenator Grassley himself was dismissive of Trump's tweet: "All I can say is, it doesn't matter what one individual in this country says". Democrats control the House of Representatives and some have already said they will not support any delay to the vote.
Reeves encouraged Trump to embrace a reelection message focused on his ability to revive the nation's economy, a familiar suggestion from frustrated Republican officials, though the president has shown little interest in adopting a consistent message.More news: Hong Kong activist Joshua Wong says 'resistance will continue'
Evan Koslof, a political reporter with WUSA9 TV channel in Washington DC, suggested Pelosi would be out of office on 3 January 2021 if federal elections were delayed and he said "next in line would be the President Pro Tempore of the Senate, which is now Senator Chuck Grassley [a Republican, from Iowa]".
If Congress approved a change of date, the election could be postponed only after a special amendment to the US Constitution was passed.
The Commerce Department said the United States economy contracted 32.9 percent in April-June - the worst since records began after the World War II - as businesses were shut down to prevent the spread of the killer disease.
So what would happen if this year's election could not go ahead on 3 November? "We will find a way to do that again this November third", Senate Majority Leader and Tump ally Mitch McConnell said.
The simple reality remains that Republicans up and down the ballot this fall need Trump's fervent base on their side to have any chance of winning.
Still, much of the editorial board's piece was critical of voting by mail, and argued that Trump's concerns shouldn't be dismissed out of hand - even if his proposed solution missed the mark. "Mail-in ballots will lead to the greatest fraud".More news: NASA relegates four astronauts to SpaceX mission planned for 2021
After facing bipartisan pushback, Trump backtracked and said that he had not been seeking a delay of the vote - but he doubled down on his concerns that the results of the mail-in voting may never see the light of the day.
Biden led Trump 49.9 percent to 41.6 percent as of Thursday night in the RealClearPolitics average of national polls. In addition, an increasing number of American states are making it easier for people to vote by mail during the coronavirus outbreak. "[Mail-in voting] has its problems, but fraud is not one of them", Dr Smith said.
Dr Smith called the 3 November election date "critical".
"I don't believe that the president is losing significant support from Republicans", Reeves said.
Representatives for the White House did not immediately respond to a request for comment.
During the pandemic, more than 4.4 million Americans have tested positive for COVID-19 and more than 150,000 have died.More news: Blue Jays manager says weekend series against Phillies is postponed