GWEN IFILL: From terrorism to taxes, the candidates dueled today over their visions of each other. Hillary Clinton talked economic policy. And Donald Trump repeatedly claimed that her failures in the Obama administration allowed a deadly new enemy to emerge.
DONALD TRUMP (R), Presidential Nominee: Oh, boy, is ISIS hoping for her.
GWEN IFILL: Trump is stepping up his effort to tie Hillary Clinton time as secretary of state to the rise of the Islamic State.
This morning, in Miami:
DONALD TRUMP: You know, if you're a sports team, most valuable player, MVP. You get the MVP award. ISIS will hand her the most valuable player award.
GWEN IFILL: And last night in Fort Lauderdale, with this about President Obama:
DONALD TRUMP: ISIS is honoring President Obama. He is the founder of ISIS. He's the founder. And I would say the co-founder would be crooked Hillary Clinton.
GWEN IFILL: The Republican nominee defended the line of attack in a call-in today to CNBC.
DONALD TRUMP: There is something wrong with saying that? Why? Are people complaining that I said he was the founder of ISIS?
QUESTION: I am wondering how you think that's going to play in some battleground states.
DONALD TRUMP: I don't know. Whatever it is, it is.
GWEN IFILL: The Clinton campaign dismissed it all as trash-talking, and said: "It goes without saying that this is a false claim. He's echoing the talking points of Vladimir Putin and our adversaries to attack American leaders and American interests."
On the campaign trail, Clinton ripped into Trump's economic policies in a speech outside Detroit. She charged he's outright scared of free trade, and likened it to the Olympics.
HILLARY CLINTON (D), Presidential Nominee: If Team USA was as fearful as Trump, Michael Phelps and Simone Biles would be cowering in the locker room afraid to come out to compete.
HILLARY CLINTON: Instead, they are winning gold medals. America isn't afraid to compete.
GWEN IFILL: Clinton went on to cite a litany of issues that she said Trump remains silent on.
HILLARY CLINTON: He's offered no credible plans to address what working families are up against today, nothing on student loans or the cost of prescription drugs, nothing for communities of color in our cities to overcome the barriers of systemic racism, nothing to create new opportunities for young people.
GWEN IFILL: But even as Clinton surges in the polls, there's new worry for Democrats about a cyber-attack blamed on Russian hackers. The New York Times reports they breached e-mail accounts of more than 100 party officials and groups. That's on top of hacking of the Democratic National Committee and the party's House campaign committee.
DNC Chair Debbie Wasserman Schultz was forced to step down when that news came to light on the eve of the party convention.
House Minority Leader Nancy Pelosi addressed the issue in Washington today:
REP. NANCY PELOSI (D), Minority Leader: Russians broke in. Who did they give the information to? I don't know. Who dumped it? I don't know. But I do know that this is a Watergate-like electronic break-in.
GWEN IFILL: Pelosi said she doesn't know whether her own e-mails were targeted. And it's equally unclear what revelations may yet be coming from the hackers.
We will turn to the candidates' competing proposals on the economy after the news summary.