Harris is expected to announce her vice presidential pick on Tuesday ahead of her rally in Philadelphia.

WASHINGTON — Vice President Kamala Harris is expected to reveal her vice presidential pick on Tuesday ahead of their first rally together in Philadelphia in the evening, according to two sources familiar with the plan.

These people cautioned that the timing of the announcement is still subject to change depending on when Harris makes her final decision or if there is a leak to the media that impacts the current plan.

Tuesday’s rollout is likely to be similar to previous major announcements, including digital video and social media components as well as a fundraising campaign, these sources said. Harris’ campaign will also release several text messages to supporters throughout the day, as has been common practice in the past around big moments. Exact details are still being worked out.

The long-awaited decision comes after Harris met in person Sunday with three of the contenders who have been under consideration as her vice presidential pick: Pennsylvania Gov. Josh Shapiro, Sen. Mark Kelly of Arizona and Minnesota Gov. Tim Walz, a source familiar with the meetings said.

Other candidates who have been on the shortlist include Illinois Gov. JB Pritzker, Kentucky Gov. Andy Beshear and Transportation Secretary Pete Buttigieg.

Former Attorney General Eric Holder, who led the vetting process for Harris’ campaign as part of his role as senior counsel at Covington and Burling LLP, was seen at the vice president’s residence at the Naval Observatory on Saturday and Sunday.

Two sources familiar with Harris’s thinking said she needs and wants to find someone who is comfortable following the lead of a woman, and particularly a Black and Indian woman. That running mate will have to be comfortable taking on tasks that he or she may not like (such as the way Harris has addressed the root causes of migration) and will have to be comfortable standing in Harris’s shadow as her running mate.

Harris’s team is aware that she won this nomination in an unconventional way, and her allies want whoever she chooses to be loyal and not seek to undermine her position now or in 2028.

A source familiar with the campaign’s thinking said the campaign is particularly interested in someone who appeals to the demographics and voters that Biden would have brought to the table, including older white voters and suburban women.

Harris’ advisers would also like the running mate to appeal specifically to white men who dislike Trump but may question whether they want to vote for a Black and South Asian woman.

“Let’s face it. There are a lot of sexist and racist white guys in America who don’t like Trump but need a little more validation,” the person said. “And bringing one of the people mentioned on the list helps validate her among those voters.”

Another source said: “She needs a middle-aged or maybe a little older white guy who has experience and who brings credentials in a different way. Someone who gives moderate Republican voters a place to go, like Haley voters who say, ‘Gosh, JD Vance is terrifying and Trump is awful, but I wasn’t really sure Biden could do the job, and I’m not sure she can do the job. ’”

Tuesday night’s rally was expected to kick off a five-day tour of seven battleground states with Harris and her running mate. An event in Savannah, Georgia, scheduled for Friday was postponed because of Tropical Storm Debby, two campaign officials said.

On Friday, Harris won a majority of support as part of a virtual slate of Democratic National Committee delegates needed to win the party’s nomination for president.

Democrats are set to begin their national convention in Chicago on August 19.