The Republican National Committee voted Friday to bar NBC and CNN from sponsoring GOP primary debates in the 2016 election, ramping up pressure to stop the networks from running programs focused on Hillary Rodham Clinton.

RNC chairman Reince Priebus, who is trying to consolidate control over the primary process, said the networks’ programs were likely aid Mrs. Clinton, who is seen as the frontrunner for the Democratic presidential nomination, and he said that’s unfair to the GOP.