(AP) – The Republican National Committee has approved a resolution to block two television networks from hosting GOP presidential primary debates.

Friday’s vote affirms RNC chairman Reince Priebus’s threat against CNN and NBC unless the networks drop plans to air programs about possible Democratic presidential contender Hillary Rodham Clinton. The vote at the committee’s summer meeting in Boston was unanimous.

Priebus said that the networks have, quote, “an obvious bias.”

Even before the Clinton dispute, Republican leaders favored plans to have fewer presidential debates with more friendly moderators. They believe their 2012 presidential candidates spent too much time beating up each other in last year’s months-long primary season, which contributed to Mitt Romney’s loss.