Spanish speaking banned on Spanish language TV

This is truly absurd:

Democrats Chris Dodd and Bill Richardson are objecting to a requirement that all presidential candidates in a debate on the Spanish-language television network Univision speak in English.

The two have signed a letter to Univision, which is trying to organize a Democratic presidential debate for Sept. 9 in Miami. The audio would be translated into Spanish.

Both candidates speak Spanish fluently and say they would prefer to address Spanish-speaking viewers without a translator. Dodd, the senator from Connecticut who wrote the letter, and Richardson, the New Mexico governor who signed on, embraced the debate with the understanding that they would be able to speak Spanish, and both campaigns say they feel that the rules have been altered to benefit those who don't.

So, who do you suppose got Univision to make this rule? I'm guessing Hillary, but who knows?