DNC 2024 Day 3: Tim Walz tells Democrats to 'leave it on the field'

Conventions are also about parties identifying those they view as future leaders.

Maryland Gov. Wes Moore's coveted speaking spot tonight will not go unnoticed.

His team said this night is about the future, forward momentum, and he is grateful to be a part of that.

He knows Democrats need to show they are delivering actual results, and he thinks he has a story to tell there. A senior staffer to the governor told ABC News he will focus on the Key Bridge collapse and talk about what Biden and Harris did to support his state.

Moore also has a personal relationship with Walz, who reached out to him when he first won and has acted as a sounding board for the governor.

Chicago police and the FBI are investigating an incident at a DNC breakfast in Chicago, which sources said involved maggots.

The Fairmont Chicago confirmed the incident happened at a DNC-related breakfast at their hotel Wednesday morning.

MORE | DNC breakfast at Fairmont Hotel disrupted with maggots, sources say; CPD, FBI investigating

A DNC breakfast at the Fairmont Hotel was disrupted when a group of women put maggots on the food tables, sources told ABC7. The FBI is investigating.

Tuesday's celebrity-studded roll call - especially a surprise performance from Lil Jon as part of the Georgia delegation - has gone viral on social media, and even more stars have been spotted in the United Center Wednesday.

Stevie Wonder and John Legend both rehearsed for performances during primetime tonight. Mandy Patinkin was also spotted inside the UC, though it wasn't clear if he would be participating in the official proceedings.

MORE | John Legend and Stevie Wonder to perform at DNC Day 3

What other celebs will be in the crowd Wednesday night? Only time will tell.

Stevie Wonder is set to perform at the DNC on Wednesday.

Stevie Wonder was seen during a mic check before the Democratic National Convention on Wednesday in Chicago.

Wonder, 74, was seen at a sound check before the convention opened, playing "Higher Ground."