Fiona Hill. Photo: Chip Somodevilla/Getty Images)

The House committees investigating President Trump and Ukraine have requested that Trump's former Russia adviser Fiona Hill appear for a deposition on Oct. 14, as well as turn over several documents dating back to January 2017.

Context: Hill left her role as Trump's top Russia aide in August, although she had wrapped up most of her work by mid-July. It's unclear how much she knew about the controversial July 25 call between Trump and Ukrainian President Volodymyr Zelensky, which is at the center of Democrats' impeachment inquiry.

  • Hill, a long-standing policy expert and critic of Russian President Vladimir Putin, served under both H.R. McMaster and John Bolton on the National Security Council.

What to watch: The White House made it clear in a letter to House Democratic leaders on Tuesday that it has no plans to cooperate with the committees' interview or document requests.

  • It was unclear as of Wednesday evening whether the Trump administration plans to block Hill from complying.

Hill could not immediately be reached for comment.

Go deeper

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.