In this July 13, 2015 file photo, Disney chief strategy officer Kevin Mayer visits the company's "accelerator" space in Glendale, Calif. Mayer will also be chief operating officer of TikTok's Chinese parent company, ByteDance, and report to its founder and CEO, Yiming Zhang, the company announced Monday, May 18, 2020. TikTok's app features short videos, many with music and dancing, that has become a favorite of younger people and is known for its goofy, light-hearted feel. (AP Photo/Damian Dovarganes, file)

Kevin Mayer, the chief executive of TikTok,  announced on Wednesday that he is resigning, just over 100 days after the former Disney executive joined the world’s largest short video app in mid-May.

The news came on the heels of TikTok’s move to sue the U.S. government over its forthcoming ban. The app, owned by Chinese internet upstart ByteDance, is caught in tensions between Beijing and Washington, which accuses the app of posing a national security threat to the U.S.

On August 6, President Donald Trump signed an executive order to shut down TikTok if ByteDance doesn’t sell the app’s U.S. operations. The app has until mid-November to divest itself.

“We appreciate that the political dynamics of the last few months have significantly changed what the scope of Kevin’s role would be going forward, and fully respect his decision. We thank him for his time at the company and wish him well,” said a TikTok spokesperson in a statement to TechCrunch.

The New York Times reported earlier that Mayer announced his decision to step down in a note to employees as TikTok came under pressure from the Trump administration over its links to China. Mayer “did not anticipate the extent to which TikTok would become involved in tensions between China and the U.S.,” sources told the Financial Times, and the executive “didn’t sign up for this.”

Vanessa Pappas, currently general manager of TikTok, will reportedly become the interim head.

The looming TikTok sale has attracted investor interest across the board, from Microsoft which publicly announced its intention through to the less expected bidder Oracle.