WASHINGTON — President Donald Trump, lagging in the polls and grappling with deepening economic and public health crises, on Thursday floated the startling idea of delaying the Nov. 3 presidential election. The notion drew immediate pushback from Democrats and Republicans alike in a nation that has held itself up as a beacon to the world for its history of peaceful transfer of power.

Trump raised the question of a delay as he pushed allegations that increased mail-in voting due to the coronavirus pandemic would result in fraud. But shifting Election Day is virtually impossible.

The date of the presidential election — the Tuesday after the first Monday in November in every fourth year — is enshrined in federal law and would require an act of Congress to change.

Top Republicans in Congress quickly rebuffed Trump’s suggestion. Senate Majority Leader Mitch McConnell said the election date is set in stone and House GOP leader Kevin McCarthy said the election “should go forward” as planned. Regardless, the Constitution makes no provisions for a delay in the end of Trump’s term — noon on Jan. 20, 2021.

“With Universal Mail-In Voting (not Absentee Voting, which is good), 2020 will be the most INACCURATE & FRAUDULENT Election in history,” Trump tweeted Thursday. “It will be a great embarrassment to the USA. Delay the Election until people can properly, securely and safely vote???”

After facing blowback from Republicans for even floating the notion, Trump appeared to retreat on Twitter Thursday afternoon, suggesting he was merely trying to highlight problems with mail-in balloting. “Glad I was able to get the very dishonest LameStream Media to finally start talking about the RISKS to our Democracy from dangerous Universal Mail-In-Voting (not Absentee Voting, which I totally support!).”

In fact, only five states conduct elections entirely by mail, although more states expect to rely more heavily on mail-in ballots in November because of the virus outbreak. California has announced plans to send ballots to all registered voters for the fall election, but will also have in-person voting options available.

“Must know Election results on the night of the Election, not days, months, or even years later!” Trump tweeted.

Experts assess that delays in counting mail-in ballots could mean results won’t be known on Election Day.

Trump’s suggestion of delaying the vote came just minutes after the government reported that the U.S. economy shrank at a dizzying 32.9% annual rate in the April-June quarter, by far the worst quarterly plunge ever, as the coronavirus outbreak shut down businesses, threw tens of millions out of work and sent unemployment surging to 14.7%.

With just over three months until Election Day, Trump trails in the polls nationally and across battleground states, and some surveys even suggest traditionally Republican-leaning states could be in play. While Trump has come back before after trailing consistently in the polls throughout 2016, the survey data has raised the possibility that he could face a landslide loss if he doesn’t turn things around.

Trump has increasingly sought to cast doubt on November’s election and the expected pandemic- induced surge in mail-in and absentee voting. He has called remote voting options the “biggest risk” to his reelection. His campaign and the Republican Party have sued to combat the practice, which was once a significant advantage for the GOP.

There is no evidence of widespread voter fraud through mail-in voting and the states that use it exclusively say they have necessary safeguards in place to ensure that a hostile foreign actor doesn’t disrupt the vote. Election security experts say that voter fraud is rare in all forms of balloting, including by mail.

Most states are still finalizing their plans for November. A small number of states sent ballots to voters during the primaries, but most states are not expected to do so in November. Instead, voters will have to request an absentee ballot if they want to vote at home.

Trump and many members of his administration have previously availed themselves of absentee voting, but Trump has sought to differentiate that from a growing push by states to mail all registered voters either ballots or absentee request forms.

Speaking at Rep. John Lewis’s funeral in Atlanta, former President Barack Obama implicitly addressed his successor’s policies on voting.

“There are those in power doing their darnedest to discourage people from voting by closing polling locations and targeting minorities and students with restrictive ID laws and attacking our voting rights with surgical precision, even undermining the postal service in the run up to an election that’s going to be dependent on mail-in ballots so people don’t get sick,” Obama said.

Voters and public health officials have expressed concerns about the potential dangers for spreading the virus during in-person voting, and states have reported difficulty filling poll worker positions given the pandemic.

Democrats have pushed to include billions of dollars in the next coronavirus relief bill to fund election security and accessibility improvements for this year’s vote, but Trump and Republicans have so far resisted those efforts. Democratic House Speaker Nancy Pelosi replied to Trump’s tweet by tweeting a quote from the Constitution assigning Congress the power to set the timing of elections.

Trump’s stated concern for poll safety defies his otherwise aggressive push to “reopen” the nation from partial shutdowns meant to slow the spread of the virus, even as rising confirmed coronavirus cases and deaths have pushed the U.S. to the top of the list for the world outbreak.

Hogan Gidley, the Trump campaign’s national press secretary, pointed to the delays in counting votes in New York’s primary. “The President is just raising a question about the chaos Democrats have created with their insistence on all mail-in voting. They are using coronavirus as their means to try to institute universal mail-in voting, which means sending every registered voter a ballot whether they asked for one or not. “

Trump has said the upcoming vote will be “the most corrupt election” in U.S. history and has refused to commit to accept the results, recalling a similar threat he made weeks before the 2016 election.

In April, Trump had ruled out the prospect of trying to change the election after Democratic rival Joe Biden predicted Trump would do so. “I’m not thinking about it at all,” Trump said. “Not at all.”

And in March, Trump opposed moves by several states to delay their presidential primaries because of the coronavirus.

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