George Stephanopoulos: What to Know About DNC Day 2

ABC News' George Stephanopoulos breaks down the top stories unfolding on the second day of the Democratic National Convention in Philadelphia.

Bill Clinton's Big Night

Bill Clinton is scheduled to deliver his tenth convention speech tonight.

"He's had some winners and some losers," Stephanopoulos said.

Bill Clinton's nominating speech for then-Massachusetts Gov. Michael Dukakis at the 1988 DNC did not receive rave reviews; he spoke for 33 minutes and lost the audience's attention until he finally said, "in conclusion." He rebounded in 1992 with his rousing acceptance speech for the Democratic presidential nomination, and again four years later when he gave the nominating speech for President Obama. But how will he fare tonight?

What Will He Say About Hillary?

This time around, Bill Clinton will be delivering an address for his wife and the presumptive Democratic nominee, Hillary Clinton. He has to affirm his spouse's platform and convey the former secretary of state's more personal side, in addition to making the case for change at a time when the Clinton family has been on the national and political stage for decades.

"Tricky night for him," Stephanopoulos said.

How Will He Handle Protesters?

Bill Clinton may also face protests from Bernie Sanders supporters who are still fuming over internal Democratic National Committee emails released by WikiLeaks that appear to show party officials strategizing how to harm Sanders politically during the primaries. Sanders' much-anticipated speech at the convention last night was met with an odd mix of cheers, boos and chants when he said Hillary Clinton "would make an outstanding president."

After a tense first day of the convention, Bill Clinton is tasked with bringing his fractured party together.

"That's his challenge tonight," Stephanopoulos said. "We'll be watching."