Republican National Committee chairman Reince Priebus banned his staff and associates from appearing on MSNBC, pending an apology from MSNBC for a tweet suggesting that conservatives "hate" biracial families.

"This morning I left a message with MSNBC President Phil Griffin to express my displeasure," Priebus said in an RNC memo. "Until he takes internal corrective action and personally apologizes ā€” not just to the RNC but to all right-of-center Americans ā€” Iā€™m banning all RNC staff from appearing on, associating with, or booking any RNC surrogates on MSNBC."

In the offending tweet, MSNBC said, "Maybe the rightwing will hate it, but everyone else will go awww: the adorable new #Cheerios ad w/ biracial family.ā€

"While we understand MSNBC will go to great lengths to discredit Republicans and conservatives, this kind of attack on the millions of Americans who identify with the political right is offensive and unacceptable," Priebus said. "This is more than just a tweet or an offhand comment. This is part of a pattern of behavior that has gotten markedly worse, and until Phil Griffin personally apologizes and takes corrective action, we cannot be part of this network's toxic programming."

MSNBC apologized on Twitter. "Earlier, this account tweeted an offensive line about the new Cheerios ad," the apology said. "We deeply regret it. It does not reflect the position of msnbc."