Photo: Justin Sullivan/Getty Images

A federal judge in Los Angeles denied a request by Uber, Postmates and two drivers to halt the enforcement of California's new law that codifies strict requirements for classifying workers as independent contractors.

Why it matters: This is a major blow to the companies and drivers in the case, as they were hoping to pause the application of the law while they sue the state to get it overturned. The law went into effect on Jan. 1.

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Podcast: Amy Klobuchar deals with mergers

Sen. Amy Klobuchar (D-Minn.) joins the Axios Pro Rata Podcast to discuss her opposition to the possible tie-up between Uber and Grubhub, her concerns over Facebook's deal for Giphy, and why she hasn't signed on to Elizabeth Warren and AOC's blanket moratorium on large mergers.

Go deeper: Democrats line up against possible Uber-Grubhub deal

A record number of female CEOs now lead Fortune 500 companies

Courtesy FORTUNE

37 female CEOs lead Fortune 500 companies — the most ever — up from 33 last year.

The big picture: Walmart leads the list for the eighth year in a row as Amazon jumps to No. 2, its highest spot ever. Additionally, 17 companies made their debut, including Uber (No. 228), the new Fox Corp. (No. 280), and Science Applications International (No.466).

The DOJ's China Initiative could be problematic for civil rights

Illustration: Sarah Grillo/Axios

A legal scholar is raising concerns about the Department of Justice's China Initiative, which is aimed at countering economic espionage, theft of intellectual property and other national security concerns related to China, and its possible implications for civil rights.

Why it matters: Amid the U.S. government's new emphasis on countering threats from China, there is growing concern about the potential for over-zealous or discriminatory investigations.