TikTok has hired a powerful new voice to fight its corner, as it steps up its fight against a congressional ban on the app.

The Chinese owned video sharing platform appears to be gearing up for a lengthy legal fight which could reach the Supreme Court after President Joe Biden signed a bill which in April which requires it to be sold off to a US company within nine months.

Longtime general counsel and policy expert at NetChoice, Carl Szabo, is leaving the company — one of DC’s top tech lobbying groups — to jopin TikTok’s government relations department, as the company looks to win favor in the courts.