George Stephanopoulos: What You Need to Know About RNC Day 3

George Stephanopoulos looks at the top story lines to watch for tonight.

Mounting Accusations of Recycled Lines

That Soviet-department-store comparison closely matched one from George Mason University law professor Frank Buckley. Buckley and Donald Trump Sr.’s campaign told ABC News that Buckley worked as a writer on Donald Trump Jr.’s address.

“I think they finally figured out how to get one of those [software] programs that’s going to prevent that,” Stephanopoulos said.

Eric Trump Takes the Stage

Donald Trump Sr.’s 32-year-old son from his first marriage, Eric Trump, will address the audience at the Quicken Loans Arena in Cleveland for the first time tonight. In an interview on “GMA” this morning, Eric Trump promised that his speech will be in his own words and will come from his heart.

“Zero,” he said when asked whether any writers helped compose his address in support of his father. “I wrote every single word of my speech myself.”

Eric Trump did not comment on his stepmother’s speech, which has been the source of much controversy. He did say that his address will “focus on the why” of his father’s campaign, why Donald Trump would forgo his success in New York City for the rigor of the campaign trail.

“I really focus on the why because I think it’s such an important question,” Eric Trump said on “GMA.” “Here’s a guy who is kind of in the apex of his career. He does not need to be doing this.”

He added, “My father cares deeply about this country. This country has given him everything.”

Mike Pence’s Big Night

It’s the first time much of the nation will see Mike Pence since Donald Trump formally introduced the Republican Indiana governor as his running mate Saturday before the convention. Trump said that one of his main reasons for choosing Pence was to promote “party unity.”

“I have to be honest. So many people have said ‘party unity,’ because I’m an outsider,” Trump said during his announcement.

“Of course, he’s got a big job to speak to the country,” Stephanopoulos said. “But also to really do more to unite this hall behind Donald Trump. It’s been kind of flat.”

Trump Policies

“Nothing about that wall on the border paid for by Mexico, nothing from the podium about the Muslim ban, nothing about scrapping trade agreements and having 35 percent tariffs with China,” Stephanopoulos said. “Those issues have really been tamped down. We haven’t heard about it at all.”

ABC News’ Chris Good, Meridith McGraw, Katie Kindelan and Adam Kelsey contributed to this report.