Some Democrats are looking at ways to replace President Biden on the ticket.

On Friday, the nomination process will begin when officials of the Democratic National Convention take steps to approve a multi-day, online virtual vote among nearly 4,000 party delegates. Voting could begin as soon as Sunday for the formally nominating Mr. Biden.

This move will all but stop any attempt to replace the 81 year old president at the convention. He is constantly being urged to step down by the party’s lawmakers.

Josh Putnam is a party rules expert, founder of FHQ Strategy LLC and a nonpartisan political consultancy. He said that the voting would be open for all or part of next week, before the votes were tallied. “In other terms, there won’t be a single day, but rather a window of time to vote.”

In all battleground states, polls show that former President Donald Trump is ahead of Mr. Biden. Democrats want to replace him as the front-runner. The disastrous performance of Mr. Biden in the June 27 debate and his frequent gaffes in subsequent interviews hasn’t helped restore confidence in his candidacy.

The majority of the delegates are expected to vote in favor of the president, despite the fact that they have been vetted and approved by the Biden Campaign. If everything goes according to plan, the president may have his nomination completed by the end of this month.

Several Democrats are now trying their best to stop this.

In a letter signed by about 20 Democrats, they call on the DNC not to proceed with the virtual nomination of Mr. Biden. They describe it as “a terrible idea” and “unnecessary.”

The Washington Times reported that the DNC was moving forward with online nominations and had planned to do so after Indiana finished its delegate list on July 13.

The plan was devised by party officials earlier this year when it seemed Ohio would not change its August 7 deadline for presidential candidates appearing on the ballot. This would have meant that Mr. Biden’s nomination at the Chicago Convention could have been too late.

The state has changed the deadline for candidate filing to September 1, but in a meeting in June, the DNC advanced its online nomination plan. They claimed it was needed in case the GOP attempted to block the extended deadline of the ballot in court.

James Roosevelt, cochairman of DNC Rules and Bylaws Committee, said: “This is the only way to make sure that mega-extremists and bad-faith lawmakers in Ohio, or any other state, cannot subvert voters’ will.”

A question about the online voting has not been answered by either Mr. Roosevelt or Democratic National Convention Chair Minyon Moore. A DNC spokesperson also did not respond to a request from the media.