(CNN) -- MSNBC regrets making what it called an "offensive" tweet suggesting that conservatives would be outraged over a Cheerios commercial featuring a racially mixed family.
The ad is set to air during this weekend's Super Bowl.
"The Cheerios tweet from @msnbc was dumb, offensive and we've taken it down. That's not who we are at msnbc," Richard Wolffe, the executive editor of MSNBC.com, tweeted late Wednesday night.
The main MSNBC account also posted an apology and said in another tweet, "We deeply regret it."
The original tweet, which has since been deleted, was posted earlier Wednesday night.
"Maybe the rightwing will hate it, but everyone else will go awww: the adorable new #Cheerios ad w/ biracial family," the tweet stated, with a link to an article about the commercial.
Responding to the tweet, Republican National Committee Chairman Reince Priebus blasted out an email Thursday morning saying he was banning his staff and RNC surrogates from appearing on MSNBC until the network's president, Phil Griffin, personally apologizes.
"We can have our political disagreements with MSNBC, but using biracial families to launch petty and ridiculous political attacks is low, even by MSNBC's standards. It only coarsens our political discourse," Priebus wrote in the email.
The Cheerios commercial features the same biracial family that appeared in an ad for the cereal brand last year. The ad sparked controversy after highlighting a family with a white mother and a black father.
Priebus also noted a string of other controversies MSNBC has faced for criticizing Republicans.
"This is more than just a tweet or an offhand comment. This is part of a pattern of behavior that has gotten markedly worse," he wrote.
Priebus referenced Alec Baldwin and Martin Bashir, who were both let go from the network after they made offensive comments about homosexuals and Sarah Palin, respectively.
Melissa Harris-Perry, host of a weekend show, also apologized this month after a panel on her program made jokes involving Mitt Romney's adopted black grandchild.
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