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This post was updated at 10:30 a.m. ET

Congress votes on President Obama's nuclear deal with Iran this month. Most lawmakers have said they oppose the deal, yet he has a good chance of winning.

That is because the deal will be considered under rules that favor him, even if only a minority supports him in Congress.

More adults across the country are strapping on helmets and hopping on bikes to get to work. That's good news for people's hearts and waistlines, but it also means more visits to the emergency room.

Hospital admissions because of bike injuries more than doubled between 1998 and 2013, doctors reported Tuesday in JAMA, the journal of the American Medical Association. And the rise was the biggest with bikers ages 45 and over.

Kentucky's Gov. Steve Beshear says he's powerless to stop Rowan County Clerk Kim Davis from refusing to issue marriage licenses to same-sex couples — something she has done for consecutive days, flouting rulings from federal courts that include the Supreme Court and prompting a motion to hold her in contempt of court.

Carly Fiorina was relegated to the JV squad in the Fox News GOP presidential debate in August, but her strong performance that night helped her race past several of her peers in recent polls.

That surge in polling wasn't enough to get her into the next big debate — but it might be now.

That's because CNN Tuesday afternoon changed its criteria for who will get into its main Sept. 16 debate in such a way that Fiorina is much more likely to be included.

Both the Nasdaq and the Dow Jones index were hit by losses Tuesday, as concerns again rose about China's economy. The Dow is now down nearly 10 percent in 2015, after falling 469 points Tuesday to close at 16,058.

Markets in Europe and Asia also suffered, after renewed worries about a slowdown in China, the world's second-largest economy.

"The latest evidence is China's purchasing manager's index," NPR's John Ydstie reports, "which shows the country's manufacturing sector contracting."

More than a month after his trial on murder charges ended in a mistrial for the second time, former Eutawville, S.C., police Chief Richard Combs has been sentenced to a year of home detention. Combs agreed to plead guilty to misconduct in office Tuesday.

Combs, who is white, was the head of the police department in the small town of Eutawville back in May 2011, when he shot and killed 54-year-old Bernard Bailey, who was black, as Bailey tried to drive away from the Eutawville Police Department.

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RACHEL MARTIN, HOST:

During his trip to Alaska, President Obama has been calling on Congress to speed up funding for the construction of icebreakers. The president says the U.S. doesn't have enough of them. NPR's Jim Zarroli explains.

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

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ROBERT SIEGEL, HOST:

Katherine Franke is a law professor at Columbia University where she heads the Public Rights/Private Conscience Project. And she joins us from New York to talk about this some more. Welcome to the program.

The largest fish farm in America could be built 4 miles off San Diego's coast.

Rose Canyon Fisheries could have a footprint on the ocean floor of 1.3 square miles, about the same size as New York's Central Park. The goal is to produce 11 million pounds of yellowtail and sea bass each year.

We all harbor biases — subconsciously, at least. We may automatically associate men with law enforcement work, for example, or women with children and family. In the workplace, these biases can affect managers' hiring and promotion decisions.

So when Pete Sinclair, who's chief of operations at the cybersecurity firm RedSeal, realized that — like many other Silicon Valley companies — his company had very few female engineers and few employees who weren't white, Chinese or Indian, he wanted to do something about it.

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