Joe Biden will most likely announce his running mate in the second week of August, again breaking a self-imposed deadline for unveiling the choice, according to two people familiar with his plans.

Biden, the presumptive Democratic presidential nominee, initially said he’d select his running mate by Aug. 1. Then on Tuesday, he told reporters that he intended to make up his mind by the end of the first week of August, which would be Aug. 8.

“I’m going to have a choice in the first week in August,” he said, “and I promise I’ll let you know when I do.”

But Friday, two people familiar with Biden’s vice-presidential search process said the announcement is not likely to come next week.

The Fix’s Aaron Blake analyzes who is on the vice presidential short list for presumptive Democratic presidential nominee Joe Biden. (The Washington Post)

There are political reasons for Biden to unveil the pick relatively shortly before the Aug. 17 kickoff of the Democratic National Convention, since that timing could add some excitement to the gathering while minimizing the opportunity for Republican attacks. Some Biden allies have been urging him to make the announcement around Aug. 10.

The former vice president has said he will pick a woman to be his running mate. He’s also said that he’s vetting four Black women for the role, and those close to the campaign say the list includes Sen. Kamala D. Harris (D-Calif.); former national security adviser Susan E. Rice; Rep. Karen Bass (D-Calif.) and Rep. Val Demings (D-Fla.). Sen. Tammy Duckworth (D-Ill.) confirmed Thursday that she’s been vetted.

Others believed to be in contention are Sen. Elizabeth Warren (D-Mass.), who has become an informal economic policy adviser to Biden in recent months, and Michigan Gov. Gretchen Whitmer.

Making the announcement just a few days before the convention would allow Biden to build buzz for the party’s quadrennial meeting, with less time for the Trump campaign to define the VP choice in negative terms. The running mate is slated to get a major speaking slot at the convention.

In 2016, Hillary Clinton’s team announced her pick, Sen. Tim Kaine (D-Va.), two days before the Democratic National Convention. Then-candidate Donald Trump similarly selected Mike Pence three days before his own convention.

Biden’s experience follows that pattern as well. In 2008, Barack Obama announced two days before the Democratic convention that Biden, then a senator from Delaware, was his choice.

Still, Biden’s running mate search has been unusual in several respects. Since announcing that he would choose a woman, several leading activists have pressed him publicly to make it a Black woman.

Some prospects, including Rice and former Georgia gubernatorial candidate Stacey Abrams, have broken with tradition to make it clear they would welcome being chosen, while others have publicly taken themselves out of consideration.

The coronavirus pandemic has also changed the dynamic. The running mate would ordinarily be introduced before a roaring crowd at the convention, followed by a barnstorming tour across the country.

With public health experts warning against large gatherings, the running mate’s appearances — like Biden’s — are likely to be largely virtual.