President Joe Biden’s pick for the empty seat on the Federal Communications Commission (FCC), Gigi Sohn, is set to have her confirmation hearing before the Senate Commerce Committee on Wednesday, where she is likely to face stiff Republican opposition and questions regarding her activist past.

“Ms. Sohn has been before my House committee many times as an activist witness,” Republican Tennessee Sen. Marsha Blackburn said in a statement shared with the Daily Caller News Foundation. “I have serious concerns regarding her placement on the FCC and look forward to having her appear before the committee.”

Sohn co-founded and served as president of tech policy think tank Public Knowledge, which receives funding from prominent left-wing billionaires, including Pierre Omidyar and George Soros in addition to being a strong advocate for net neutrality.