House Minority Leader Hakeem Jeffries got a huge laugh when took a jab at former President Donald Trump, calling him "an old boyfriend who you broke up with, but he just won’t go away."

"He has spent the last four years spinning the block, trying to get back into a relationship with the American people. Bro, we broke up with you for a reason," he said to cheers.

Former President Bill Clinton scrapped a version of his speech after the watching the first night of the convention, several people familiar with the speech told ABC News.

Clinton, who is speaking Wednesday night, revised his speech to make sure the "substance meets the moment" and wanted to strike a more "joyful" tone, after he was struck by the energy of the convention floor, one source said.

A senior adviser to Clinton told ABC News that "it was clear to him that, in the spirit of Mario Coumo, we needed more poetry, not prose."

Cuomo gave the keynote address at the 1984 Democratic convention, saying, "We Democrats must unite so that the entire nation can unite, because surely the Republicans won't bring this country together."

-ABC News' Rachel Scott and Katherine Faulders

Actress Mindy Kaling is tonight's celebrity host.

In 2019, she and Harris went viral for a video in which they prepared masala dosa, a South Indian dish.

In her introduction, Kaling referred to herself as "the woman who courageously outed Kamala Harris as Indian in an Instagram cooking video."

Democrats have already brought out multiple celebrities Wednesday, including musical legend Stevie Wonder and comedian Kenan Thompson. The crowd roared each time in surprise.

John Legend will also perform later.

Both parties have used celebrities, including wrestler Hulk Hogan at the Republican National Convention.