The 5 stories PR pros need to know on Friday morning, 8.7.2015

1. Friday morning’s Republican debate headlines: Washington Post: The Donald is still on top — for the moment, at least; Business Insider: A Fox News focus group just torched Donald Trump after the debate; New York: Donald Trump’s newest enemy: Fox News; Reuters: Bush turns in workmanlike performance, but will it be enough?; BuzzFeed: Low-key Marco Rubio thrives in noisy GOP debate, but will abortion comment hurt him?; Newsweek: Fiorina comes out ahead in scrappy Republican undercard debate.

2. The White House lost a key Democrat on Iran on Thursday night. In an announcement likely timed to coincide with the GOP debate in Cleveland, Sen. Charles Schumer (D-NY) said he will not support the nuclear deal with Iran. The president is making his case for the accord.

3. Economists are expecting a better-than-normal jobs report for July when the numbers are released on Friday morning. Five things to look for in the report, according to The Wall Street Journal. Update: The US economy added 215,000 jobs last month, and the unemployment rate remained at 5.3%. Both numbers are in line with analysts' expectations.

4. Jon Stewart signed off for the last time from The Daily Show on Thursday night after 16 years as its host. Steve Carrell, John Oliver, Samantha Bee, and Trevor Noah were among the alumni who made guest appearances.

5. MDC Partners tried to reassure investors that it hasn’t been leaking business since former CEO Miles Nadal quit the holding company amid a Securities and Exchange Commission investigation last month. It said on its second-quarter earnings call on Thursday that its Strategic Marketing Services unit, which contains its PR firms, saw 11.5% organic revenue growth in the quarter. The company also revealed Nadal owes it an additional $12.7 million.