WASHINGTON (AP) — The Republican National Committee charged Monday that NBC and CNN are promoting a potential presidential candidacy by Hillary Rodham Clinton, threatening to blackball them from future GOP primary debates if they air upcoming programs on the former secretary of state.

RNC chairman Reince Priebus called a planned NBC miniseries on Clinton and a CNN documentary on the first lady an “extended commercial” for a future Clinton presidential campaign. In separate letters to the networks, he urged them to cancel “this political ad masquerading as an unbiased production.”