According to The Wall Street Journal, Director of National Intelligence Jay Clayton will chair the working group, effectively becoming the government's AI affairs chief; Federal Trade Commission Chairman Andrew Ferguson, Department of War Undersecretary for Research and Engineering Emil Michael, and Office of Personnel Management Director Scott Kupor will serve as vice chairs. These personnel arrangements are currently only source claims.
The same report says the working group has 120 days to submit a report on AI risks and opportunities, and its charter requires developing a plan to address superintelligence threats while avoiding overregulation and regulatory capture. Clayton told The Wall Street Journal that it would be irresponsible for the United States to back away on AI, and that one of the biggest risks is failing to be first.
It should be noted that the source does not provide the working group's formal establishment document, terms of reference, or legal basis. Therefore the judgment that "Clayton becomes the AI affairs chief" is, strictly speaking, still a description at the level of secondhand account, not an institutional arrangement already in effect.