Massachusetts Rep. Katherine Clark focused on the burden of child care costs, saying Harris and Walz "know that when everyone can find and afford child care, our kids and our communities will thrive."

The Harris campaign said it aims to keep some money in middle-class consumers' pockets by reducing their tax burden.

The plans include a restoration of the expanded child tax credit of $3,600 per child that expired in 2022. Harris also proposed an additional, new $6,000 child tax credit for families with a child in the first year of life.

Former HUD secretary Marcia Fudge and Congressman Ted Lieu just touted Harris' housing proposals, which she unveiled last week.

Harris has vowed to provide up to $25,000 in down-payment support for first-time homeowners and called for the construction of 3 million new housing units to ease the housing supply shortage.

Read more about what economists had to say about Harris' plan.

Sen. Alex Padilla, the first Latino to represent California and Vice President Kamala Harris’ Senate successor, told the crowd "I knew that I had some big Chuck Taylors to fill."

Harris for years has often sported the popular shoe.

White outfits peppered the convention hall here in an ode to suffragists and Harris' historic candidacy.

The outfit motif has been a hallmark of House Democrats, who have used the color to send a signal at major events, such as past state of the union addresses, including this year's, when Democrats sought to make a point about abortion.

-ABC News' Tal Axelrod