George Stephanopoulos: What You Need to Know About DNC Day 1

George Stephanopoulos breaks down the top story lines unfolding tonight.

— -- Several storylines are already unfolding as the Democratic National Convention kicks off in Philadelphia today. ABC News’ George Stephanopoulos has it covered.

First Day of the Convention

“[Trump] did himself some good in Cleveland,” Stephanopoulos said. “The question is, will Democrats do the same?”

Drama Within the Democratic National Committee

The committee’s communications director, Luis Miranda, tweeted that vice chairwoman Donna Brazile will serve as interim chairwoman “through the election.” According to party sources, Wasserman Schultz’s role at the convention will be severely limited.

Wasserman Schultz was jeered at a Florida delegation breakfast today, where members of the audience shouted “shame” and interrupted her speech. Some of the protesters were holding signs that read “Emails” or were wearing shirts in support of Sanders.

It is not known whether Wasserman Schultz will still take the stage on the convention floor tonight at the Wells Fargo Center. If she does, she could face a similar crowd.

“They have to get past this Debbie Wasserman Schultz problem,” Stephanopoulos said. “Will she get booed when she appears in the hall today?”

Sanders and Warren Speak Tonight

“What I’m going to be looking for is, ‘How forcefully do they actually defend Hillary Clinton and her agenda?’” said Stephanopoulos. “Do they show the love for Hillary Clinton?”

Sanders and Warren have formally endorsed Clinton, a former secretary of state. But Sanders supporters, fuming over the hacked emails, demonstrated against Clinton over the weekend and are expected to make noise during the convention.

“I’ve known Tim Kaine for a number of years. We’ve served in the Senate together, obviously. Tim is a very, very smart guy,” Sanders said on NBC’s “Meet the Press.” “He’s a very nice guy. His political views are not my political views. He is more conservative than I am. Would I have preferred to see somebody like an Elizabeth Warren selected by Secretary Clinton? Yes, I would have.”

First lady Michelle Obama will also take the stage tonight, and everybody’s wondering whether she will address the allegations that Melania Trump plagiarized one of her speeches.

“Does she tease her? Does she make a joke? Does she reach out? Does she thank her? I think that’s going to be one of the highlights tonight,” Stephanopoulos said.

Melania Trump came under fire for delivering a speech on the first night of the Republican National Convention that mirrored portions of Obama’s address to the Democratic National Convention in 2008. Donald Trump’s campaign chairman, Paul Manafort, denied allegations that Melania Trump, a former model and Donald Trump’s third wife lifted portions of her speech from Obama.

But Meredith McIver, a longtime friend and staffer of the Trump family, ultimately stepped forward with an apology for her involvement in the preparation of Melania Trump’s address. The staffer said she submitted her resignation but the Trump family rejected it.