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KNOW IT ALL: Wednesday's Top 7 Stories at NBC News

A look at the key headlines.
Image: Gymnastics - Artistic - Olympics: Day 11
Simone Biles of the United States competes on the women's floor final at the Rio 2016 Olympic Games on August 16, 2016 in Rio de Janeiro, Brazil.Alex Livesey / Getty Images

Good morning. Here are some of the headlines we're following this morning:

1. Donald Trump Shakes Up Campaign Leadership

The GOP presidential nominee is shaking up his campaign's leadership amid flagging poll numbers. Kellyanne Conway as newly installed campaign manager and Stephen Bannon as campaign CEO will lend a mixture of GOP star power and street credibility to a campaign dogged by questions about how deep its campaign experience runs. Read more in POLITICS.

2. Trump Directs ‘Law and Order’ Speech at African Americans

Trump made his most direct pitch yet to African-American voters Tuesday, connecting the recent violence in Milwaukee to what he described as the plight of African Americans nationwide. Read more in POLITICS.

3. What to Watch on Day 12 of the Olympics

After an upset in beach volleyball with Americans Kerri Walsh Jennings and April Ross falling to Brazil in the semifinals match Tuesday, the U.S. looks to rebound on Day 12. Decathlete Ashton Eaton will begin vying for what he hopes will become his second straight Olympic title. Read more in SPORTS.

4. California Blaze Forces 82,000 to Flee

A fast-growing 18,000-acre wildfire burned through rural communities in California overnight, triggering a state of emergency and evacuation orders for more than 82,000 residents in the San Bernardino area. Read more in NEWS.

5. Drug Kingpin El Chapo’s Son Kidnapped in Mexico

The son of jailed drug kingpin Joaquín "El Chapo" Guzmán was among among the several people recently kidnapped from a swanky restaurant in the resort town of Puerto Vallarta, a Mexican prosecutor said. Read more in NEWS.

6. Legendary Talk Show Host John McLaughlin Dies

McLaughlin, who every week for more than three decades headed a boisterous public affairs show, died Tuesday morning, the program's staff said. His final public message to his fans was on Aug. 13, when he explained on his show's website that he had missed recent tapings because of poor health. Read more in NEWS.

7. Strangled Jogger's Parents Make Reward Offer to Killer

The parents of murdered Queens, New York, jogger Karina Vetrano offered privately-raised reward money if their daughter's killer turned themselves in to police. Read more at NBC NEW YORK.

Nightly Spotlight

On top of her four gold medals, including another one on Tuesday, American gymnast Simone Biles still had one more dream to accomplish — and it finally came true in Rio.