The St. Luke's hospital in Houston's Texas Medical Center. Photo: Aurora Fierro/Cover/Getty Images

ProPublica and the Houston Chronicle have published another story in their investigative series on Baylor St. Luke's Medical Center, an acclaimed hospital in Houston — this time showing a world-renowned heart surgeon is "accused of violating federal research rules and skirting ethical guidelines."

The bottom line: St. Luke's sits in one of the most famous medical care corridors in the world. According to ProPublica, the hospital's marketing has covered up serious lapses in heart care that have led to many patient deaths.

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There's little consensus on TikTok's specific national security threat

Illustration: Aïda Amer/Axios

TikTok has become a Rorschach test for how U.S. politicians view China, with little consensus on the specifics of its threat to homeland security.

The big picture: Much of what D.C. fears about TikTok is fear itself, and that's reflected in President Trump's executive order to ban the app by Sept. 20 if it's not sold by parent company ByteDance — alongside another focused on Chinese messaging app WeChat and its parent company Tencent.

U.S. sanctions Hong Kong leader Carrie Lam

Photo: Anthony Kwan/Getty Images)

The Treasury Department on Friday placed sanctions on Hong Kong leader Carrie Lam, following months of tension as she has allowed continued overreach by Beijing to subvert Hong Kong's autonomy.

Why it matters: It's the toughest sanction yet imposed on China for its destruction of Hong Kong’s relatively free political system.

GM's high-stakes electric move

The Cadillac Lyriq. Image courtesy of Cadillac

Cadillac on Thursday unveiled the Lyriq, the luxury brand's first all-electric model and GM's first consumer electric vehicle unveil since the Chevy Bolt several years ago.

Why it matters: It's the first reveal by GM of an electric vehicle that will use the company's new modular platform and Ultium battery system — technologies meant to underpin the 20 electric vehicles that GM plans to launch by 2023.