Solicitor General Elena Kagan plans to make her first argument before the Supreme Court on Sept. 9 in the case of Citizens United v. Federal Election Commission, the so-called “Hillary — The Movie” case. Justice Department spokeswoman Beverley Lumpkin on Monday confirmed reports that Kagan plans to argue the case.

It’s the oral argument the Supreme Court ordered as it recessed for the summer, to consider whether Austin v. Michigan Chamber of Commerce and part of McConnell v. FEC should be overturned. The scheduling of the rare summer argument alarmed supporters of campaign finance reform who fear the Court is preparing to overturn the ban on use of corporate or union treasury money for independent campaign expenditures. Briefs on the issues set forth by the Court are due this week.